Chemistry-Physical and Chemical Changes [NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension]: Questions 1 - 6 of 44

Access detailed explanations (illustrated with images and videos) to 1058 questions. Access all new questions- tracking exam pattern and syllabus. View the complete topic-wise distribution of questions. Unlimited Access, Unlimited Time, on Unlimited Devices!

View Sample Explanation or View Features.

Rs. 450.00 -OR-

How to register? Already Subscribed?

Question 1

Physical and Chemical Changes
Edit

Question

MCQ▾

Which of the following is an example of a chemical change?

Choices

Choice (4)Response
a.Sublimation
b.Dissolution of salt in water
c.Evaporation of water
d.Rusting of iron

Question 2

Physical and Chemical Changes
Edit

Question

MCQ▾

On adding ethanoic acid to NaHC0 3, what will happen?

Choices

Choice (4)Response
a.CO 2 gas is evolved
b.NO 2 gas is evolved
c.SO 2 gas is evolved
d.O 2 gas is evolved

Question 3

Physical and Chemical Changes
Edit

Question

MCQ▾

On adding dilute HCl to granulated zinc placed in a test tube, the observation made is

Choices

Choice (4)Response
a.the surface of the metal turns shining
b.a colorless and odourless gas evolves with bubbles.
c.odour of chlorine is observed.
d.the reaction mixture turns milky.

Question 4

Physical and Chemical Changes
Edit

Question

MCQ▾

The latent heat of vaporization of water is

Choices

Choice (4)Response
a.22.5 × 10 5
b.3.34 × 10 5
c.2.2 × 10 5
d.None of the above

Question 5

Physical and Chemical Changes
Edit

Question

MCQ▾

Evaporation of liquid occur at

Choices

Choice (4)Response
a.all temperature
b.boiling point
c.fixed temperature lower than the boiling point
d.Question does not provide sufficient data or is vague

Question 6

Physical and Chemical Changes
Edit

Question

MCQ▾

An element is determined by the number of

Choices

Choice (4)Response
a.electrons
b.protons
c.atoms
d.neutrons