# NSTSE (National Science Talent Search Exam- Unified Council) Class 9: Questions 124 - 127 of 2000

Access detailed explanations (illustrated with images and videos) to 2000 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. Unlimited Access for Unlimited Time!

View Sample Explanation or View Features.

Rs. 550.00 or

How to register?

## Question number: 124

Edit
MCQ▾

### Question

Who discovered Law of conservation of mass?

### Choices

Choice (4)Response

a.

Dalton

b.

Proust

c.

Richter

d.

Lavoisier

## Question number: 125

Edit
MCQ▾

### Question

In a parallelogram ABCD, and . Each of its diagonals is less than ________.

### Choices

Choice (4)Response

a.

24 cm

b.

12.5 cm

c.

25.3 cm

d.

2.3 cm

## Question number: 126

Edit
MCQ▾

### Question

If A: Two triangles are said to be congruent if two sides and one angle of one triangle are respectively equal to the two sides and an angle of the other and

R: Two triangles are congruent if two sides and the included angle of one must be equal to the corresponding two sides and included angle of the other triangle.

Then which of the following statement is correct?

### Choices

Choice (4)Response

a.

A is false and R is correct explanation of A

b.

A is true and R is correct explanation of A

c.

A is true and R is false

d.

None of the above

## Question number: 127

Edit
MCQ▾

### Question

ABCD is a parallelogram as shown in below figure. If and O is mid-point of AB, then is equal to:

### Choices

Choice (4)Response

a.

b.

c.

d.

Developed by: