Question

Q 1 In presence of which of the following ,silver bromide dissociates into silver and bromine? *

Heat

MnO2

Sunlight

Electricity

Q2 A colourless sample was tested with a strip of universal indicator .The colour of the sample changed to green. The sample should be *

Tap water

Distilled water

Sodium hydroxide

Lemon juice

Q3 The nature of metal oxide is *

Acidic

Basic

Amphoteric

Neutral

Q4 During deficiency of tissues of human beings ,pyruvic acid is converted into lactic acid in the *

Cytoplasm

Chloroplast

Mitochondria

Golgi body

Q5 In which of the following group of organisms ,food materials are broken down outside the body and absorbed? *

Mushroom ,Green plants,Amoeba

Yeast, Mushroom, Bread mould .

Paramecium ,Amoeba ,Cuscuta

Cuscuta, Lice Tapeworm

Q6 Choose the function of pancreatic juice from the following *

trypsin digests proteins and lipase carbohydrates

trypsin digests emulsified fats and lipase proteins

trypsin and lipase digests fat

trypsin digests proteins and emulsified fats.

Q7 During respiration exchange of gases takes place in *

Trachea and larynx

Alveoli of lungs

Alveoli and throat

Lungs and larynx

Option 5

Q8 Which of the following is the future of the shoot? *

Radicle

Plumule

Cotyledon

None of these

Q9 Sperms are produced in *

Seminal vesicle

Prostate gland

Scotum

None of these

Q10 Rhizopus reproduce through *

Spores

Stock

Tendril

Bud

Q11 A zygote has X-chromosome inherited from father will develop into *

boy

girl

X-chromosome does not determine sex

either boy or a girl

Q12 In peas ,a pure tall plant (TT) is crossed with a short plant (t t) .The ratio of pure tall plant is to short plants in F2 is *

1:3

3:1

1:1

2:1

Q13 Sonu is looking his image in back side of a shining spoon .His image will be *

inverted and enlarged

inverted and diminished

erect and enlarged

erect and diminised

Q14 On entering from denser to rarer medium ,the ray of light *

goes away from the normal

bends towards normal

does not reflect

reflects

Q 15 Twinkling of stars is due to atmospheric *

dispersion of light due to water droplets

refraction of light by different layers of varying refractive indices

scattering of light by dust particles

internal reflection of light by clouds

Q.16. Which of the following phenomena contributes significantly to the reddish appearance of sunrise and sunset? *

Dispersion of light

Scattering of light.

Total internal reflection of light.

Reflection of light from the earth.

Q17. The clear sky appears blue because *

blue light get absorbed by the atmosphere,

ultraviolet radiations are absorbed in the atmosphere.

violet and blue lights get scattered more than lights of all other colours by the atmosphere

Light of all other colours is scattered more than the violet and blue colour lights by yhe atmosphere.

Q18. The work done in bringing a unit charges from one point to another is called *

current

resistance

potential difference

none of these

Q19 The unit of electric charge is *

ohm

volt

coulomb

ampere

Q20. The resistivity of a conductor *

increases on increasing its area of cross section.

increases on increasing its length

increases on decreasing its length

does not depend on its length and cross sectional area

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Answer 1

Answer:

Q1 (1).Q2 (3) Q3 (2)

Explanation:

not same answers bat izee h answer