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2022

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13. Assertion : Hot soup tastes better than the cold soup. Reason : Hot soup has high surface tension and it does not spread properly on our tongue.

Read the assertion and reason carefully to mark the correct option out of the options given below: (a)       If both...

Assertion : The embryo of bryophyte is independent. Reason : The zygote of thallophyte is dependent.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

1. Equimola solutions in the same solvent have

a. Same boiling point but different freezing point b. Same freezing point but different boiling point c. Same boiling and...

Assertion : Bryophytes possess archegonium as a female sex organ. Reason : Algae also possess the archegonium

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

Assertion : The bryophytes exist in two phases – gametophyte and sporophyte. Reason : The sporophyte is nutritionally independent.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

98. The mole fraction of a solvent in aqueous solution of a solute is 0.8. The molality of the aqueous solutions is

a. 13.88 x 10 -3 b. 13.88 c. 13.88 x 10-2 d. 13.88 x 10-1 Ans. b (12)

97. 8g of NaOH is dissolved in 18 g of

H2 O. Mole fraction  of NaOH in solution and molality of the solutions respectively are : a. 0.2, 11. 11...

96. 50mL of 0.5M oxallic acid is needed to neutralize 25mL of sodium hydroxide solution. The amount of NaOH in 50 mL of the given sodium hydroxide solution is:

a. 10 g b. 40g c. 80 g d. 4g Ans. d (7)

Assertion : The sex organs in the bryophytes are jacketed. Reason : Bryophytes are land plants.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

95. 25mL of the given HCl solution requires 30mL of 0.1M sodium carbonate solution.What is the volume of this HCl solution required to titrated 30mL of 0.2M aqueous NaOH solution

a. 12.5mL b. 75 mL c. 50 mL d. 25mL Ans. d (3)

94. A solution of sodium sulphate contains 92g of

Na+     ions per kilogram of water. The molality of  Na+     ions in that solution in mol kg-1  is : a....

Assertion : Red algae contribute in producing coral reef. Reason : Some red algae secrete and deposit calcium carbonate our their walls.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

93. Which of the following is dependent on temperature

a. Molality b. Molarity c. Mole fraction d. Weight percentage Ans. b Explanation : Molarity has volume term in its...

Assertion : Spirogyra shows haplontic life cycle. Reason : Zygotic meiosis occurs in Spirogyra.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

83. What will be the value of molality for an aqueous solution of 10% w/w NaOH.

a.  2.778 b. 5 c. 10 d. 2.5 Ans. a (9)

Assertion : Isogamy is a primitive type of sexual reproduction. Reason : The gametes are of different sizes.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

82. A 5.2 molal aqueous solution of methyl alcohol,

CH3  OH , is supplied. What is the mole fraction of methly alcohol in the solution a. 0.100 b. 0.190 c....

3. Assertion : When height of a tube is less than liquid rise in the capillary tube, the liquid does not overflow. Reason : Product of radius of meniscus and height of liquid in capillary tube always remains constant.

Read the assertion and reason carefully to mark the correct option out of the options given below: (a)       If both...

Assertion : Spirogyra is slippery in touch. Reason : Spirogyra consists a gelatinous sheath.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

81. What is the molality of pure water

a. 1 b. 18 c. 55.5 d None of these Ans. c Explanation :  Molality is defined as the no....

1. Assertion : It is easier to spray water in which some soap is dissolved. Reason : Soap is easier to spread.

Read the assertion and reason carefully to mark the correct option out of the options given below: (a)       If both...

Assertion : Only red algae are able to flourish at the great depth of sea. Reason : Red algae has the pigments r-phycoerythrin and r-phycocyanin.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

78. Molarity of

H2 SO4  is 18 M. Its density is 1.8 g/mL. Hence molality is a. 36 b. 200 c. 500 d....

12. Assertion : The water rises higher in a capillary tube of small diameter than in the capillary tube of large diameter. Reason : Height through which liquid rises in a capillary tube is inversely proportional to the diameter of the capillary tube.

Read the assertion and reason carefully to mark the correct option out of the options given below: (a)       If both...

Assertion : Zygospore of Ulothrix forms meiozoospores and meioaplanospores. Reason : Both are motile.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

92. The weight percent of sucrose in an aqueous solution is 3.42. The density of the solution is

1g mL-1  , the concentration of sucrose in the solution in mol L-1  is: a. 0.01 b. 0.1 c. 1.0 d....

11. Assertion : Tiny drops of liquid resist deforming forces better than bigger drops. Reason : Excess pressure inside a drop is directly proportional to surface tension.

Read the assertion and reason carefully to mark the correct option out of the options given below: (a)       If both...

Assertion : All the cells Ulothrix filament are alike. Reason : Ulothrix filament is unbranched.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

91. What does not change on changing temperature

a. Mole fraction b. Normality c. Molality d. None of these Ans.a (18)

10. Assertion : A large soap bubble expands while a small bubble shrinks, when they are connected to each other by a capillary tube. Reason : The excess pressure inside bubble (or drop) is inversely proportional to the radius.

Read the assertion and reason carefully to mark the correct option out of the options given below: (a)       If both...

90. What will be the molality of the solution containing 18.25 g of HCl gas in 500 g of water

a. 0.1 m b. 1 M c. 0.5m d. 1 m Ans.d (11)

Assertion : Chlorella could be utilised to keep the air in space vehicles. Reason : The space travellers feed on Chlorella soup.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

9. Assertion : At critical temperature, surface tension of a liquid becomes zero. Reason : At this temperature, intermolecular forces for liquids and gases become equal. Liquid can expand without any restriction.

Read the assertion and reason carefully to mark the correct option out of the options given below: (a)       If both...

89. The density of 3M solution of NaCl is 1.25

gL-1 . The molality of this solution is a. 2.79 b. 1.79 c. 0. 79 d. 2.98 Ans. a (15)

Assertion : In green algae, the eye-spot is present in the cell. Reason : Eye-spot is meant for respiration.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

8. Assertion : The concept of surface tension is held only for liquids. Reason : Surface tension does not hold for gases.

Read the assertion and reason carefully to mark the correct option out of the options given below: (a)       If both...

Assertion : Pyrenoids are utilised during starvation. Reason : Pyrenoids are proteinaceous bodies.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

88. A solution of

Al2 (SO4)3  {d= 1.253 gm/mL } contain 22% salt by weight. The molarity, normality and molality of the solution is...

7. Assertion : The angle of contact of a liquid decrease with increase in temperature. Reason : With increase in temperature, the surface tension of liquid increase.

Read the assertion and reason carefully to mark the correct option out of the options given below: (a)       If both...

6. Assertion : The impurities always decrease the surface tension of a liquid. Reason : The change in surface tension of the liquid depends upon the degree of contamination of the impurity.

Read the assertion and reason carefully to mark the correct option out of the options given below: (a)       If both...

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