NSO Level 1- Science Olympiad (SOF) Class 10: Questions 77 - 82 of 986

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Question number: 77

» Mental Ability

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Appeared in Year: 2011

MCQ▾

Question

Consider the following statements: When two straight lines intersect,

(i) Adjacent angles are complementary

(ii) Adjacent angles are supplementary

(iii) Opposite angles are equal

(iv) Opposite angles are supplementary

Which of the following statements must be true?

Choices

Choice (4) Response

a.

(i) and (iv)

b.

(ii) and (iii)

c.

(ii) and (iv)

d.

(i) and (iii)

Question number: 78

» Mental Ability

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MCQ▾

Question

Three friends divided Rs. 585 among themselves in the ratio . The share of the second friend is?

Choices

Choice (4) Response

a.

Rs. 300

b.

Rs. 90

c.

Rs. 180

d.

Rs. 200

Question number: 79

» Chemical Reactions and Equation

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MCQ▾

Question

Iron rusts more slowly in contact with _

Choices

Choice (4) Response

a.

Less active metal

b.

More active metal

c.

More active non metal

d.

Less active non-metal

Question number: 80

» Acids, Bases and Salts

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MCQ▾

Question

“When acid or base dissolve in water with constant stirring at that time energy released. ” Which of the following is correct for this process?

Choices

Choice (4) Response

a.

It decreases in the concentration of ions per unit time.

b.

Endothermic process

c.

Exothermic process

d.

Both a. and c. are correct

Question number: 81

» Mental Ability

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MCQ▾

Question

Solve: , then find the value of x:

Choices

Choice (4) Response

a.

10

b.

18

c.

15

d.

12

Question number: 82

» Mental Ability

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MCQ▾

Question

The ratio between the radius of the base and the height of the cylinder is . If the volume is , the total surface area of the cylinder is ________.

Choices

Choice (4) Response

a.

b.

c.

d.