Questions
If one wants to keep food fresh for a few months, what should one do?
- Food should be heated to keep it warm and safe.
- Food should be refrigerated at about 5 degree centigrade.
- Food can be preserved in a deep freezer at a temperature below -18 degee centigarde.
- We cannot stop growth of microbes hence we cannot preserve the food.
What is the unit of inheritance in living organism?
- Chromosome
- Gene
- Nucleus
- Cell
Who developed the idea of lightning conductor to protect tall buildings?
- Benjamin Franklin
- William Gilbert
- Charles F. Richter
- None of these
Pick the odd one from the following:
Pencillium, Paramecium, Yeast, Agaricus
- Pencillium
- Paramecium
- Yeast
- Agaricus
Graphite is a _________. It is a good conductor of electricity.
- metal
- non-metal
- metalloid
- none of the above
Why is crude oil known as black gold?
- Because of its colour.
- Its importance in today's world.
- We get gold out of this black liquid after processing.
- None of these
What do you mean by Endemic species?
- Species which do not adjust to enviromental changes and so their population decreases.
- Species which disappear from earth.
- Species that are found only in a particular area.
- None of these
Tsunami is a ________.
- japanese word given to a large earthquake
- japanese word given to a large wave
- japanese word given to series of giant waves
- japanese word given to sea storm
What is the amplitude of the oscillation?
- The maximum distance from the centre by which the pendulum moves.
- The time taken for one oscillation.
- It is the number of oscillations per second.
- The maximum distance from one end to another extreme the pendulum covers.
What is the other name of Spring harvest?
- Winter crops
- Rabi crops
- Kharif crops
- (1) and (2) are correct
________ force is required to kick a football and __________ force is required to take out bucket full of water from well.
- Push, pull
- Pull, push
- Push, push
- None of these
Corrosion is useful in
(a) when iron gets rusted
(b) siver ornaments turn black
(c) when aluminium corrodes
(d) none as corrosion cannot be useful
- (a)
- (b)
- (c)
- (d)
In India, coal deposits are mainly found in ___________.
- Jharkhand
- West Bengal
- Chhatisgarh
- All of these
Which is the man made plastic used to coat non-stick pans?
- Teflon
- Bakelite
- Melamine
- All of these
Which of the following statements is correct about sonorous substances?
- If a ringing sound is produced on striking the surface, the substance is known as sonorous, e.g., metals.
- If a substance is soluble in water, it is called sonorous.
- The substances that make a sound on heating are known as sonorous.
- Substances that react with dilute acids to produce salts are known as sonorous.
Which is the first synthetic fibre made from chemicals only?
- Nylon
- Silk
- Rayon
- Polyster
Which of the following sequences of steps is correct for nitrogen cycle?
(a) Nitrogen fixation, nitrification, ammonification, nitrogen assimilation, denitrification
(b) Nitrogen assimilation, nitrogen fixation, ammonification, nitrification, denitrification
(c) Denitrification, nitrification, ammonification, nitrogen assimilation, nitrogen fixation
(d) Nitrogen fixation, nitrogen assimilation, ammonification, nitrification, denitrification
- (a)
- (b)
- (c)
- (d)
When forests are cut down to use the wood for other purposes, it is called __________.
- afforestation
- desertification
- deforestation
- none of these
_______ is the membrane which separates the outer ear from middle ear.
- Pinna
- Ear drum
- Ear tube
- None of these
Where lies the blind spot region in the eye?
- It is a spot on the cornea.
- It is the junction of optic nerve and the retina.
- It is on the lens.
- None of these
Why do boys have deep voice whereas girls have high pitched voice?
- The voice box or larynx grow bigger in boys than girls.
- The boys are physically stronger than girls.
- The vibration made by vocal cord is more in boys.
- All of these together affect the sound.
The image formed by _________ lens varies in nature but image formed by ________ lens is always virtual.
- concave, convex
- convex, plane
- plane, concave
- convex, concave
Who named the charges as negative and positive?
- William Gilbert
- Sir Issac Newton
- Benjamin Franklin
- None of these
What is the name of the transparent liquid filled in the space between cornea and the lens?
- Aqueous humour
- Vitreous humour
- Corneal liquid
- None of these
Plastic has a very hazardous effect on our environment. To save our environment, we should practise the four R's. What does the 4 R's (RRRR) mean?
- Refuse, Reduce, Reuse, Reproduce
- Remake, Reduce, Reuse, Recycle
- Refuse, Reduce, Reuse and Recycle
- None of these