NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension: Questions 861 - 864 of 1042

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Question number: 861

» Mathematics » Square and Cube Root

MCQ▾

Question

If (a - b): (a + b) = 1: 5, then what is (a2 - b2): (a2 + b2) equal to

Choices

Choice (4) Response

a.

13: 15

b.

2: 3

c.

3: 2

d.

5: 13

Question number: 862

» Biology » Micro-Organisms

MCQ▾

Question

Which feature of some species of blue-green algae helps to promote them as bio-fertilizers?

Choices

Choice (4) Response

a.

They convert atmospheric methane into ammonia which the crop plant can absorb readily

b.

They induce the crop plant to produce the enzymes which help to convert atmospheric nitrogen to nitrate

c.

They have a mechanism to convert atmospheric nitrogen into form that the crop plants can absorb readily

d.

They induce the roots of the crop plants to absorb the soil nitrates in large quantities

Question number: 863

» Physics » Magnetism & Electricity at Work

MCQ▾

Question

The masses of the three wires of copper are in the ratio 5:3:1 and their lengths are in the ratio 1: 3: 5. The ratio of their electrical resistance is

Choices

Choice (4) Response

a.

5:3:1

b.

1:3:5

c.

125:15:1

d.

1:15:125

Question number: 864

» Chemistry » Structure of Atom

Match List-Ⅰ List-Ⅱ▾

Question

Match the following Compound Formula
List-Ⅰ (List 1) List-Ⅱ (List II)

(A)

Baking soda

(i)

NaCl Codes

(B)

Rock salt

(ii)

Na2CO3

(C)

Washing soda

(iii)

NaHCO3

(D)

Alum

(iv)

KAl(SO4)2·12H2O

Choices

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

a.

  • (iii)
  • (i)
  • (ii)
  • (iv)

b.

  • (i)
  • (iii)
  • (ii)
  • (iv)

c.

  • (iv)
  • (iii)
  • (ii)
  • (i)

d.

  • (ii)
  • (i)
  • (iv)
  • (iii)

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