NTSE Stage-2 (National-Level) Scholastic-Aptitude & Language Comprehension: Questions 401 - 405 of 828

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Question number: 401

» Chemistry » Acid Bases and Salt

MCQ▾

Question

Consider the following pairs

I. Lemon-citric acid II. Sting-acetic acid

III. Bauxite-aluminum oxide IV. Calamine-zinc oxide

Which pairs is/are not correctly matched?

Choices

Choice (4) Response

a.

II and IV

b.

I and IV

c.

II and III

d.

II, III and IV

Question number: 402

» Mathematics » Percentage

MCQ▾

Question

If x is inversely proportional to y and x is increase by 20%, then y decrease by (Note x and y have same initial value)

Choices

Choice (4) Response

a.

1213 %

b.

1723 %

c.

1623%

d.

2245%

Question number: 403

» 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: 404

» Physics » Motion and Force

MCQ▾

Question

Graph of Distance vs. Time

Graph of Distance vs. Time

Showing the graph of Distance vs. Time and slope made by it This graph shows

Choices

Choice (4) Response

a.

constant velocity

b.

constant acceleration

c.

constant speed

d.

All of the above

Question number: 405

» Physics » Light

MCQ▾

Question

Consider the following statements

I. Concave mirror forms virtual and enlarged image of a real object placed very near to it, so it is used by dentists to examine teeth.

II. Concave lens always form virtual image of smaller size of a real object and it is thinner in middle.

III. Plane mirror always forms virtual image of the same size of a real object.

IV. Convex mirror always forms virtual image of bigger size of a real object.

V. Convex lens forms real and diminished image of a real object placed near to it, so it is used as reading glass.

Which of the above statements is/are correct ?

Choices

Choice (4) Response

a.

I, II and III

b.

II and III

c.

IV and V

d.

All of the above

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