Chemistry (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 50 - 55 of 142

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Question number: 50

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

Which of these methods is used to extract alcohol from a mixture of alcohol and water?

Choices

Choice (4) Response

a.

Oxidation

b.

Bleaching

c.

Crystallization

d.

Distillation

Question number: 51

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

Varsha adds a few drop of the universal indicator solution to a dilute solution of NaHCO3 taken in a test-tube. She observed………colour.

A test-tube containing dilute solution of NaHCO3

A Test-Tube Containing Dilute Solution of NaHCO3

Find colour of mixture after adding universal indicator solution in test-tube

Choices

Choice (4) Response

a.

green

b.

Yellow

c.

mustard

d.

blue

Question number: 52

» Chemistry » Metals & Non Metals

MCQ▾

Question

A compound ‘X’ is an allotrope of an element of atomic number 6. Compound ‘X’ is greyish-black in color. By nature, it is opaque and it is used in making ‘pencil leads’ and black paints. Identify the compound ‘X’.

Choices

Choice (4) Response

a.

Carbon

b.

Graphite

c.

Lead

d.

Fullerene

Question number: 53

» Chemistry » Structure of Atom

MCQ▾

Question

The element with atomic number 9, 17, 35, 53 and 85 are all

Choices

Choice (4) Response

a.

light metals

b.

noble gases

c.

halogens

d.

heavy metals

Question number: 54

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

Consider the following statements

I. Pyrolusite is the ore of zinc.

II. Calamine is the ore of manganese.

Which of the above statement (s) is/are correct?

Choices

Choice (4) Response

a.

I and II

b.

I nor II

c.

Only I

d.

Only II

Question number: 55

» Chemistry » Periodic Classification of Elements

Match List-Ⅰ List-Ⅱ▾

Question

Match the following:
List-Ⅰ (Reactants) List-Ⅱ (Products)

(A)

2Al(s)+6HCl(aq)

(i)

2KOH

(B)

Na2O(s)+H2O(l)

(ii)

2NaOH

(C)

K2O(s)+H2O(l)

(iii)

2AlCl3(aq)+3H2(g)

Choices

Choice (4) Response
  • (A)
  • (B)
  • (C)

a.

  • (i)
  • (iii)
  • (ii)

b.

  • (iii)
  • (ii)
  • (i)

c.

  • (iii)
  • (i)
  • (ii)

d.

  • (ii)
  • (iii)
  • (i)

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