MCQ
The hardest substance is:
- ✓Diamond.
- BGraphite.
- CChalk.
- DSulphur.
✓
Answer
Correct option: A.
Diamond.
Diamond.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Why is it unsafe to switch on a bulb with wet hands?
Which of the following items cannot be picked up by a magnet?
When Asha suspended four bars of different materials from a pole and brought the North pole of a bar magnet near part $P $ and $Q$ of each bar one by one as shown in figure, then observations she recorded are as follows:
Which of the following sets correctly represents metal bars $I, II, III$ and $IV?$
→
|
Bar
|
Part $P$
|
Part $Q$
|
|
$I$
|
Pushed
|
Pulled
|
|
$II$
|
Nothing happened
|
Nothing happened
|
|
$III$
|
Pulled
|
Pushed
|
|
$IV$
|
Pulled
|
Pulled
|
Which of the following items when mixed in wastes help red worms in grinding their food?
Which method is used to separate the mixtures whose component are of different sizes?
DIRECTIONS: Read the passage(s) given below and answer the questions that follow Passage - If you collect the garbage from your home and put it in separate pits covered with soil for a few days. You will find that something in the garbage rots. They form manure which is used for plants. The rotting and conversion of some materials into manure is called:
Which planet is called morning star or evening star?
DIRECTIONS: Read the passage given below and answer the questions that follow. Passage An electric cell is a source of electricity. Such cells are used in alarm clocks, wrist watches, transistor radios, cameras, etc. An electric cell is used:
Which one of the following statements is correct?
Statement $1$: The mixture having uniform composition is an example of homogeneous mixture.
Statement $2$: Salt- water solution is an example of homogeneous mixture.
→Statement $1$: The mixture having uniform composition is an example of homogeneous mixture.
Statement $2$: Salt- water solution is an example of homogeneous mixture.
Direction: Read the passage $(s)$ given below and answer the questions that follow Passage Sheetal once preparing evening tea. In the mean while telephone bell rangs and she rushed upto attend telephone call. She got busy on phone and sudden heard a sound from kitchen. When she enter back in kitchen. She saw that tea water was boiling with steal over it and cover of tea container is flew a side with water droplets over it. Water droplets on cover of tea container represents.
→