NEET - Grade 11 - Chemistry - Equilibrium - Study ref# 2066
Predict if the solutions of the following salts are
neutral, acidic or basic :
Answer:
read moreNEET - Grade 11 - Chemistry - Equilibrium - Study ref# 2068Equal volumes of 0.002 M solutions of sodium iodate and
cupric chlorate are mixed together. Will it lead precipitation of copper
iodate?(For cupric iodate Ksp=7.4×10-8) Answer:
(Due to mixing of equal volumes, molar concentratio... read moreNEET - Grade 11 - Biology - The Living World - Study ref# 3472Name and briefly explain five taxonomic aids. Answer: Five taxonomic aids are described below:Herbarium – Herbarium is a store house of collected plant specimens that are dried, pressed and preserved on sheet that are further arranged according to... read moreNEET - Grade 11 - Biology - Biomolecules - Study ref# 4140Why do amino acids change their structure in different pH? Answer: A specific characteristics property of amino acids is the ionizable nature of –NH2 and –COOH group and so the structure of amino acids changes in the solutions of different pHs.... read moreNEET - Grade 11 - Biology - Transport in Plants - Study ref# 4304Write short note on different types of tonic solutions? Answer: There are three types of tonic solutions:Isotonic solution: The two solutions with same osmotic concentration. When we place a cell into isotonic solution the cells nether shrinks ... read moreNEET - Grade 11 - Biology - Mineral Nutrition - Study ref# 4413Define hydroponics? State its uses? Answer: Hydroponics: It is the
technique where plants are grown in known nutrient solutions in absence of
soil, so that to understand the functions of specific nutrient/s in plant
lifecycle.
Now a d... read moreNEET - Grade 12 - Chemistry - Solutions - Study ref# 9699Which of the following units is useful in
relating concentration of solution with its vapour pressure?
(a) Mole fraction
(b) Parts per million
(c) Mass percentage
(d) Molality Answer: (a) According to Henry’s law partial
pressure o... read moreNEET - Grade 12 - Chemistry - Solutions - Study ref# 9700On dissolving sugar in water at room
temperature solution feels cool to touch. Under which of the following cases
dissolution of sugar will be most rapid?
(a) Sugar crystals in cold water
(b) sugar crystals in hot water
(c) Powdered s... read moreNEET - Grade 12 - Chemistry - Solutions - Study ref# 9701A beaker contains a solution of substance
‘A’. Precipitation of substance ‘A’ take place when small
amount of ‘A’ is added to the solution. The solution is ……… .
(a) Saturated
(b) Supersaturated
(c) Unsaturated
(d) ... read moreNEET - Grade 12 - Chemistry - Solutions - Study ref# 9702Low concentration of oxygen in the blood
and tissues of people living at high altitude is due to
(a) Low temperature
(b) Low atmospheric pressure
(c) High atmospheric pressure
(d) Both low temperature and high
atmospheric pressure A... read moreNEET - Grade 12 - Chemistry - Solutions - Study ref# 9703Considering the formation, breaking and
strength of hydrogen bond, predict which of the following mixtures will show
a positive deviation from Raoult’s law?
(a) Methanol and acetone
(b) Chloroform and acetone
(c) Nitric acid and water
... read moreNEET - Grade 12 - Chemistry - Solutions - Study ref# 9704Colligative properties depend on
(a) the nature of the solute particles
dissolved in solution
(b) the number of solute particles in solution
(c) the physical properties of the solute
particles dissolved in solution
(d) the nature o... read moreNEET - Grade 12 - Chemistry - Solutions - Study ref# 9705Which of the following aqueous solutions
should have the highest boiling point?
(a) 1.0 M NaOH
(b) 1.0 M Na2SO4
(c) 1.0 M NH4NO3
(d) 1.0 M KNO3 Answer: As we know greater the value of van’t
Hoff factor higher will be the elevation ... read moreNEET - Grade 12 - Chemistry - Solutions - Study ref# 9706The unit of ebullioscopic constant is
(a) K kg mol-1 or K (molality)-1
(b) mol kg K-1 or K-1
(molality)
(c) kg mol-1K-1 or
K-1 (molality)-1
(d) K mol kg-1 or K
(molality) Answer: (a) As ... read moreNEET - Grade 12 - Chemistry - Solutions - Study ref# 9707An unripe mango placed in a concentrated
salt solution to prepare pickle shrivels because………. .
(a) it gains water due to osmosis
(b) it loses water due to reverse osmosis
(c) it gains water due to reverse osmosis
(d) ... read moreNEET - Grade 12 - Chemistry - Solutions - Study ref# 9708Which of the following statements is
false?
(a) Two different solutions of sucrose of
same molality prepared in different solvents will have the same depression in
freezing point.
(b) The osmotic pressure of a solution is
given by t... read moreNEET - Grade 12 - Chemistry - Solutions - Study ref# 9709Which of the following statements is
false?
(a) Units of atmospheric pressure and
osmotic pressure are the same
(b) In reverse osmosis, solvent molecules
move through a semipermeable membrane from a region of lower concentration of
... read moreNEET - Grade 12 - Chemistry - Solutions - Study ref# 9710Consider the figure and mark the correct
option.
(a) Water will move from side (A) to side
(B) if a pressure lower osmotic pressure is applied on piston (B)
(b) Water will move from side (B) to side
(A) if a p... read moreNEET - Grade 12 - Chemistry - Solutions - Study ref# 97114 L of 0.02 M aqueous solution of NaCl
was diluted by adding 1 L of water. The molality of the resultant solution
is……… .
(a) 0.004
(b) 0.008
(c) 0.012
(d) 0.016
Hint: To calculate the strength of
solution wh... read moreNEET - Grade 12 - Chemistry - Solutions - Study ref# 9712If two liquids A and B form minimum
boiling azeotrope at some specific composition then
(a) A-B interactions are stronger than
those between A-A or B-B
(b) Vapour pressure of solution increases
because more number of molecules of liqu... read moreNEET - Grade 12 - Chemistry - Solutions - Study ref# 9713Two beakers of capacity 500 ml were
taken. One of these beakers, labelled as “A”, was filled with 400 ml water
whereas the beaker labelled “B” was filled with 400 ml of 2M solution of
NaCl. At the same temperature both the beakers were place... read moreNEET - Grade 12 - Chemistry - Solutions - Study ref# 9714Isotonic solutions must have the same………
.
(a) solute
(b) density
(c) elevation in boiling point
(d) depression in freezing point Answer: (c, d) Isotonic solutions have same
osmotic pressure and same concentration. E... read moreNEET - Grade 12 - Chemistry - Solutions - Study ref# 9715Which of the following binary mixtures
will have same composition in liquid and vapour phase?
(a) Benzene-toluene
(b) Water-nitric acid
(c) Water-ethanol
(d) n-hexane-n-heptane Answer: (b, c) Mixtures having some composition
in liq... read moreNEET - Grade 12 - Chemistry - Solutions - Study ref# 9716Components of a binary mixture of two
liquids A and B were being separated by distillation. After some time
separation of components stopped and composition of vapour phase became same
as that of liquid phase. Both the components started com... read moreNEET - Grade 12 - Chemistry - Solutions - Study ref# 9717Explain the solubility “rule like
dissolve like” in terms of intermolecular forces that exist in solutions. Answer: If the intermolecular interactions are
similar in both constituents, i.e., solute and solvent then solute dissolves
in the so... read moreNEET - Grade 12 - Chemistry - Solutions - Study ref# 9718Concentration terms such as mass
percentage, ppm, mole fraction and molality are independent of temperature,
however molarity is a function of temperature. Explain.
Hint: To solve this problem notice the
role of temperature in componen... read moreNEET - Grade 12 - Chemistry - Solutions - Study ref# 9719What is the significance of Henry’s law
constant? Answer: According to Henry’s law
Higher the value of Henry’s law constant, the lower is the solubility
of the gas in a liquid. Thus, the solubility of a gas in the given liquid can
be in... read moreNEET - Grade 12 - Chemistry - Solutions - Study ref# 9720Why are aquatic species more comfortable
in cold water in comparison to warm water? Answer: Aquatic species are more comfortable in
cold water due to the presence of more oxygen. Solubility of oxygen in water
increases with decrease in tempe... read moreNEET - Grade 12 - Chemistry - Solutions - Study ref# 9721Why is the vapour pressure of an aqueous
solution of glucose lower than that of water? Answer: In pure liquid, the entire surface of
liquid is occupied by the molecules of water. When a non-volatile solute, e.g.,
glucose is dissolved in wate... read moreNEET - Grade 12 - Chemistry - Solutions - Study ref# 9722What is “semipermeable membrane”? Answer: Continuous sheets or films (natural or
synthetic) which contain a network of submicroscopic holes or pores through
which small solvent molecules (water etc.) can pass, but solute molecules of
bigger ... read moreNEET - Grade 12 - Chemistry - Solutions - Study ref# 9723Define the following modes of expressing
the concentration of a solution? Which of these modes are independent of
temperature and why?
(a) w/w (mass percentage)
(b) V/V (volume percentage)
(c) w/V (mass by volume
percentage)
(d) ... read moreNEET - Grade 12 - Chemistry - Solutions - Study ref# 9724Using Raoult’s law explain how the total
vapour pressure over the solution is related to mole fraction of components
in the following solutions.
(a) CHCl3 (l) and CH2Cl2
(l)
(b) NaCl(s) and H2O (l)
Answer: According to Raoult’s law... read moreNEET - Grade 12 - Chemistry - Solutions - Study ref# 9725Discuss biological and industrial
applications of osmosis. Answer: (i) In animals, water moves into
different parts of the body under the effect of the process of osmosis.
(ii) Stretching of leaves, flower, etc.,
is also controlled by osm... read moreNEET - Grade 12 - Chemistry - Electrochemistry - Study ref# 9734Conductivity of
an electrolytic solution depends on
(a)
Nature of electrolyte
(b)
Concentration of
electrolyte
(c)
Power of AC source
(d)
Distance between the
electrodes Answer: (a, b)
conductivity of ... read moreNEET - Grade 12 - Chemistry - Electrochemistry - Study ref# 9743Solutions of two
electrolytes A and B are diluted the of ‘b’ increases 1.5
times while that of a increases 25 times. Which of the two is a electrolyte?
Justify your answer. Answer: Strong
... read moreNEET - Grade 12 - Chemistry - Electrochemistry - Study ref# 9744When acidulated
water (dil. H2SO4 solution) is electrolyzed, with pH of
the solution be affected? Justify your answer. Answer: Since pH of
solution depends upon concentration of H+ presence in solutions. pH of the
solutions will not be ef... read moreNEET - Grade 12 - Chemistry - Surface Chemistry - Study ref# 9779The values of colligative properties of
colloidal solution are of small order in comparision to those shown by true
soolutions of same concentration because of colloidal particles……… .
read more NEET - Grade 12 - Chemistry - Surface Chemistry - Study ref# 9793Assertion (A)
Colloidal solution show colligative properties.
Reason (R)
Colloidal particles are large in size.
(a) &nb... read more NEET - Grade 12 - Chemistry - Surface Chemistry - Study ref# 9794Assertion (A)
Colloidal solutions do not show Brownian motion.
Reason (R) Brownian
motion is responsible for stability of sols.
read more NEET - Grade 12 - Chemistry - Chemistry in Everyday Life - Study ref# 10058Which of the following statements is not
correct?
(a) Some antiseptics can be added to
soaps
(b) Dilute solutions of some
disinfectants can be used as antiseptic
(c) Disinfectants are antimicrobial
drugs.
(d) Antiseptic medici... read more
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