20 questions
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Which of the following materials is not lustrous?
Gold
Silver
Wood
Diamond
Which type of the following materials is used for making the front glass (wind screen) of a car?
Transparent
Translucent
Opaque
None of the above
An oiled paper act as a _______ material.
Transparent
Translucent
Hard
Opaque
Take two samples, one is oil and other is water. Mix the two. You observe that
They are soluble.
Oil floats on water
Water floats on oil
None of the above
Which of the following does not float on water?
Feather
Paper
Coconut oil
Stone
Which of the following statements is not true?
Materials are grouped for convenience.
Materials are grouped to study their properties.
Materials are grouped for fun.
Materials are grouped according to their uses
Which of the foll has dull appearance ?
aluminium foil
brick
steel bucket
steel chair
which of the foll is opaque?
tinted glass
glass
butter paper
wood panel
Metals are used for making pans because they are
shiny
fire proof
hard
making ringing sound
Raghav and his friends have been given 3 substances and asked to find out which of them is the hardest. Which of these is the most scientific way to start?
Raghav: "Let us understand what the meaning of hard is and a way to measure it."
Ramesh: "This piece of glass is the hardest - I have read that glass is very hard."
Sajida: "Let us ask our seniors the answer - they must have done this last year."
Sanjana: "This is not in our syllabus - how can we do it?"
The teacher of a class sorted out certain objects into two groups. On what basis has the teacher sorted them?
whether the objects are circular or not.
whether the objects give light or not.
whether the objects are used for measuring or not
whether the objects are useful to us or not.
Hussain was applying paint on the wall during which some of the paint fell on his hands. Instead of using water, Hussain used kerosene oil to wash his hands.
Which of the following options explains Hussain's decision?
Kerosene is softer than water.
Kerosene smells better than water.
Paints dissolve in kerosene and not in water.
Kerosene is more easily available than water.
Which of these is OPAQUE?
Cooking oil
Mirror
Spectacles
River water
The space between particles is maximum in
solids
liquids
gases
both solids and liquids
Cooking oil floats on water because
oil is lighter than water
oil is a poor conductor
oil is heavier than water
oil is neither heavier nor lighter than water