Chemistry (NTSE Stage-2 (National-Level) Scholastic-Aptitude & Language Comprehension): Questions 8 - 12 of 63

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Question number: 8

» Chemistry » Structure of Atom

Appeared in Year: 2013

MCQ▾

Question

An element X (atomic number 12) reacts with another element Y (atomic number 17) to form a compound Z. Which of the following statements is true regarding this compound?

I. Molecular formula of Z is Equation .

II. It is soluble in water.

III. X and Y are joined by sharing of electrons.

IV. It would conduct electricity in the molten, state.

Choices

Choice (4) Response

a.

II and III

b.

I, III and IV

c.

I and III

d.

II and IV

Question number: 9

» Chemistry » Fibres and Plastics

MCQ▾

Question

Polycot is a mixture of

Choices

Choice (4) Response

a.

polyester + cotton

b.

nylon + cotton

c.

polythene + cotton

d.

Question does not provide sufficient data or is vague

Question number: 10

» Chemistry » Carbon and Its Compounds

MCQ▾

Question

Naphthalene is obtained from

Choices

Choice (4) Response

a.

coal tar

b.

light oil fraction

c.

ethane

d.

Question does not provide sufficient data or is vague

Question number: 11

» Chemistry » Acid Bases and Salt

MCQ▾

Question

An element when burnt in air forms an oxide which is a good dehydrating agent. The oxide on dissolution in water gives its oxyacid. The oxide forms salt with caustic soda but not with sulphuric acid. The oxyacid of the element is

Choices

Choice (4) Response

a.

phosphoric acid

b.

hypo phosphorus acid

c.

boric acid

d.

phosphorus acid

Question number: 12

» Chemistry » Metals & Non Metals

Match List-Ⅰ List-Ⅱ▾

Question

Match the following
List-Ⅰ (Types Of Metal) List-Ⅱ (Characteristics Of Metal)

(A)

Mercury

(i)

Deposition of reddish brown layer on exposure to moist air

(B)

Copper

(ii)

Formation of green layer on exposure to moist air

(C)

Iron

(iii)

Can be cut easily with a knife

(D)

Potassium

(iv)

Liquid at room temperature

Choices

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

a.

  • (iv)
  • (ii)
  • (i)
  • (iii)

b.

  • (iv)
  • (iii)
  • (ii)
  • (i)

c.

  • (iii)
  • (ii)
  • (iv)
  • (i)

d.

  • (iv)
  • (ii)
  • (iii)
  • (i)

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