Rulers, measuring tapes and metre scales are used to measure

(a)

Mass

(b)

Weight

(c)

Time

(d)

Length

A car is being driven at a speed of 20 ms^-1 when brakes are applied to bring it to rest in 5 s. The decelaration produced in this case will be

(a)

+4 ms^-2

(b)

‒4 ms^-2

(c)

‒0.25 ms^-2

(d)

+0.25 ms^-2

A real and enlarged image can be obtained by using a

(a)

convex mirror

(b)

plane mirror

(c)

concave mirror

__________ has the same properties throughout the sample

(a)

Pure substance

(b)

Mixture

(c)

Colloid

(d)

Suspension

The correct electronic configuration of potassium is

(a)

2,8,9

(b)

2,8,1

(c)

2,8,8,1

(d)

2,8,8,3

A growing seedling is kept in the dark room. A burning candle is placed near it for a few days. The tip part of the seedling bends towards the burning candle. This is an example of ____________.

(a)

chemotropism

(b)

thigmotropism

(c)

phototropism

(d)

geotropism

Which is not a feature of chordates

(a)

Green glands

(b)

Sweat glands

(c)

Sebaceous gland

(d)

Mammary gland

Food and Adulteration Act was enforced by Government of India in the year __________.

(a)

1964

(b)

1954

(c)

1950

(d)

1963

The specific heat capacity of water is

(a)

4200 Jkg^-1K^-1

(b)

420 Jg^-1K^-1

(c)

0.42 Jg^-1K^-1

(d)

4.2 Jkg^-1K^-1

The following is not a safety device.

(a)

Fuse

(b)

Trip switch

(c)

Ground connection

(d)

Wire

Transformer works on.

(a)

AC only

(b)

DC only

(c)

both AC and DC

(d)

AC nor effectively than DC

The element that would form anion by gaining electrons in a chemical reaction is ___________.

(a)

Potassium

(b)

Calcium

(c)

Fluorine

(d)

Iron

Since metal carbonate and metal bicarbonate are basic they react with acids to give salt and water with the liberation of__________

(a)

NO₂

(b)

SO₂

(c)

CO₂

(d)

SO₄

Which of the following is a complex tissue?

(a)

Parenchyma

(b)

Collenchyma

(c)

Xylem

(d)

Sclerenchyma

Bile helps in the digestion of________

(a)

proteins

(b)

sugar

(c)

fats

(d)

carbohydrates

A musical instrument is producing continuous note. This note cannot be heard by a person having a normal hearing range. This note must then be passing through

(a)

wax

(b)

vacuum

(c)

water

(d)

empty vessel

The Big Bang occurred ________ years ago.

(a)

13.7 billion

(b)

15 million

(c)

15 billion

(d)

20 million

Graphite is used as lubricant in machines because

(a)

it is good conductor of electricity

(b)

it is made of slippery layers and has high melting point

(c)

it has high density

(d)

it is strong and soft

Which of the following does not contain natural dyes?

(a)

Potato

(b)

Beetroot

(c)

Carrot

(d)

Turmeric

Which of the following is one of the strategies to conserve water?

(a)

Water recycling

(b)

Increasing the number of bore wells

(c)

Using large overhead water tanks

(d)

Watering the plants using hose