• Chemistry (Class XI / XII)
Back
0

Chemistry (Class XI / XII)

Description: Engineering entrance
Number of Questions: 15
Created by:
Tags: Engineering entrance Hormones Vitamins Alkanes and Cycloalkanes Liquid State Transition Elements Alcohols and Phenols Organic Compounds with Functional Groups Containing Oxygen -1 Emulsions Vapour Pressure of Solution Aromatic Hydrocarbons
Start the Quiz
Attempted 0/15 Correct 0 Score 0
‹
›

Which of the following hormones is produced under the condition of stress, which stimulates the glycogenolysis in liver of human being?

  1. Thyroxin

  2. Insulin

  3. Adrenaline

  4. Estradiol

  5. None of these

Show answer
Correct Option: C
Explanation:

This option is correct because the adrenalin hormones helps release the fatty acid from fats and glucose from the liver glycogen under the condition of stress,  hence is called as flight of fight hormones

When n-hexane is heated with anhydrous AlCl3 and HCl gas the major products formed are __________.

  1. 1-chlorohexane

  2. 2-chlorohexane

  3. 3-chlorohexane

  4. Mixture of 2-methylpentane and 3-methylpentane

  5. None of these

Show answer
Correct Option: D
Explanation:

This option is correct because the n-hexane reacts in the presence of anhydrous AlCl3 and  HCl gas to form the mixture of 2-methylpentane and 3-methylpentane.

Considering Sc(III), Ti(IV), Pd(II) and Cu(II) ions, which of the following options is correct?

  1. All are paramagnetic.

  2. All are diamagnetic.

  3. Sc(III) and Ti(IV) are paramagnetic and Pd(II) and Cu(II) are diamagnetic.

  4. Sc(III) and Ti(IV) are diamagnetic while Pd(II) and Cu(II) are paramagnetic.

  5. None of these

Show answer
Correct Option: D
Explanation:

This option is correct because the Sc(III) and Ti(IV) are diamagnetic while Pd(II) and Cu(II) are paramagnetic.

Which of the following statements is incorrect about steroid hormones?

  1. Testosterone regulates the development of female reproductive organs.

  2. Progesterone maintain the pregnancy in females.

  3. Cortisone regulates the metabolism of the fats.

  4. Options 2 and 3 correct

  5. None of these

Show answer
Correct Option: A
Explanation:

This option is correct because the testosterone  regulates the development of the male reproductive organs.

Which of the following statements is/are incorrect?

1. Vapour pressure of liquid is the measure of the strength of intermolecular attractive force.

  1. Surface tension of liquid acts perpendicular to the surface of liquid.
  2. Vapour pressure of all the liquids is the same at their freezing point.

  1. All of the above

  2. Only 1 and 2

  3. Only 3

  4. Only 1 and 3

  5. None of these

Show answer
Correct Option: C
Explanation:

This option is correct because the vapour pressure of all liquids is different at their freezing point.

Which of the following compounds reacts with tollen reagent and forms silver minor and cannot participate in aldol condensation?

  1. 3-pentanone

  2. 2, 2 dimethylpropanal

  3. 3, hydroxyl, 2-pentene

  4. Options 1 and 3 are correct

  5. None of these

Show answer
Correct Option: B
Explanation:

This option is correct because the 2, 2 dimethylpropanal reacts with  tollen reagent to form the 2, 2 dimethylpropanate and silver minor. Since, 2, 2 dimethylpropanal does not contain alpha-hydrogen, it does not undergoes aldol condensation.

An emulsion is formed when ____________.

  1. A gas is dispersed in a liquid

  2. A gas is dispersed in a solid

  3. A liquid is dispersed in a gas

  4. A liquid is dispersed in the liquid

  5. None of these

Show answer
Correct Option: D
Explanation:

This option is correct because emulsion is colloidal dispersion in which both dispersed phase and dispersion medium are liquid.

The antipernicious anemia factor belongs to vitamins ____________.

  1. B12

  2. B6

  3. B2

  4. C

  5. None of these

Show answer
Correct Option: A
Explanation:

This option is correct because vitamins B12 involves the formation of red blood cells. Deficiency  of it causes pernicious anemia, accompanied by degradation of spinal cord. Thus vitamins B12 is known as antipernicious anemia factor.

Which of the following compounds combine to prepare lachrymator (tear gas)?

  1. Acetophenone and chlorine

  2. Benzaldehydes and chlorine

  3. Benzaldehydes and acetophenone

  4. Acetophenone and acetophenone

  5. None of these

Show answer
Correct Option: A
Explanation:

This option is wrong because the acetophenone are treated with chorine in absence of catalyst to form phenacyl chloride. These are harmless, powerful lachrymator or tear gas, which is used by police to disperse mob.

When a non volatile substance is dissolved in solvent, the vapour pressure of the solvent decreases. This results in ____________.

  1. an increase in boiling point of the solvent

  2. a decrease in the boiling point of solvent

  3. the solution will have a higher freezing point than the solvent

  4. the solution will have lower osmotic pressure than the solvent

  5. none of these

Show answer
Correct Option: A
Explanation:

This option is correct because the boiling point of liquid in the temperature at which its vapour pressure is equal to atmospheric pressure of liquid, is lowered. When a non volatile solute is added, the temperature of solution of vapour pressure will be equal to the atmospheric pressure and will be higher than the temperature of pure solvent. Boiling point of solution increases by addition of non-volatile substance.

Schiff’s base is formed by the condensation of _____________.

  1. benzaldehydes and aniline

  2. benzene diazonium chloride

  3. aniline and phosgene

  4. aniline and benzoyl chloride

  5. none of these

Show answer
Correct Option: A
Explanation:

This option is correct because Schiff’s base is formed by the condensation of benzaldehydes and aniline.

Hormone adrenaline is derivative of which of the following?

  1. Alpha-amino acid iodine atom

  2. Sulphonamide

  3. Thiamine pyrophosphate

  4. Catechol

  5. None of these

Show answer
Correct Option: D
Explanation:

This option is correct because these are secreted by the medulla part of the adrenal body. It  is  the derivative of catechol.

Which of the following statements is true regarding oxytocin hormones?

  1. It causes the contraction of uterus during child birth

  2. It inhibits the excretion of water from the body through urine

  3. It stimulates the rate of oxidation metabolism

  4. It increases pulse rate and blood pressure

  5. None of these

Show answer
Correct Option: A
Explanation:

This option is correct because the oxytocin causes the contraction of uterus during child birth coupled with milk ejection and antidiuratic effect.

Which of the following compounds are aromatic, non-aromatic and anti-aromatic respectively. (1) cyclopentadienyl cation (2) cyclopropenyl anion (3) cyclooctatetraene (4) benzene Choose the correct order.

  1. (4), (1), (2)

  2. (4), (3), (2)

  3. (1), (2), (3)

  4. (2), (1), (3)

  5. None of the options is correct

Show answer
Correct Option: B
Explanation:

This option is correct because bezene is aromatic, cyclooctatetraene is non-aromatic and cyclopropenyl anion is anti-aromatic.

Chloroform reacts with conc nitric acid to form ____________.

  1. chloropicrin

  2. chloretone

  3. westron

  4. westrosol

  5. none of these

Show answer
Correct Option: A
Explanation:

This option is correct because the chloroform reacts with conc nitric acid to form Cl3NO2; chloropicrin. It is liquid and used as tear gas and insecticides.

- Hide questions
ADVERTISEMENT

Find more quizzes from top tags

general knowledge
3615 Quizzes
119858 Questions
 technology
307 Quizzes
36705 Questions
 sports
963 Quizzes
19148 Questions
 history
1187 Quizzes
13475 Questions
 physics
598 Quizzes
13441 Questions
 biology
1160 Quizzes
12174 Questions
 science & technology
551 Quizzes
11015 Questions
 chemistry
490 Quizzes
9892 Questions
 maths
518 Quizzes
9324 Questions
 softskills
0 Quizzes
7131 Questions