# NSTSE (National Science Talent Search Exam- Unified Council) Class 9: Questions 320 - 326 of 2000

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## Question number: 320

Edit
MCQ▾

### Question

Choose the correct statement.

### Choices

Choice (4)Response

a.

The diagonals of a parallelogram are equal

b.

The diagonals of a rectangle are perpendicular to each other.

c.

If the diagonals of a quadrilateral intersect at right angles, it is not necessarily a rhombus.

d.

Every quadrilateral is either a trapezium or a parallelogram or a kite.

## Question number: 321

Edit
MCQ▾

### Question

ABCD is a parallelogram in which diagonals intersect at O. If then

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 322

Edit
MCQ▾

### Question

In a if and , then and are

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 323

Edit
MCQ▾

### Question

Due to evaporation which process takes place?

### Choices

Choice (4)Response

a.

Thermal expansion

b.

Cooling down

c.

Liquefaction

d.

All of the above

## Question number: 324

Edit
Match-Triplets▾

### Question

Find matching triplet:

### Choices

Choice (4)Response

a.

Brass

Sulphur

Water

b.

Sulphur

Brass

Water

c.

Sulphur

Water

Brass

d.

Water

Sulphur

Brass

## Question number: 325

Edit
MCQ▾

### Question

A, B, C are the three angles of a triangle. If , then are

### Choices

Choice (4)Response

a.

b.

c.

d.

All of the above

## Question number: 326

Edit
MCQ▾

### Question

ABCD is a parallelogram and ‘O’ is the point of intersection of its diagonals AC and BD. If the area of , the area of the parallelogram is ________.

### Choices

Choice (4)Response

a.

b.

c.

d.

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