NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension: Questions 280 - 284 of 1058
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Question number: 280
» Chemistry » Physical and Chemical Changes
Question
Varsha adds a few drop of the universal indicator solution to a dilute solution of taken in a test-tube. She observed………colour.
A Test-Tube Containing Dilute Solution of NaHCO3
Choices
| Choice (4) | Response | |
|---|---|---|
a. | mustard | |
b. | green | |
c. | blue | |
d. | Yellow | |
Question number: 281
» Chemistry » Metals & Non Metals
Question
A compound ‘X’ is an allotrope of an element of atomic number 6. Compound ‘X’ is greyish-black in color. By nature, it is opaque and it is used in making ‘pencil leads’ and black paints. Identify the compound ‘X’.
Choices
| Choice (4) | Response | |
|---|---|---|
a. | Carbon | |
b. | Graphite | |
c. | Lead | |
d. | Fullerene | |
Question number: 282
» Physics » Magnetism & Electricity at Work
Question
A magnetic needle kept in a non-uniform magnetic field experiences
Choices
| Choice (4) | Response | |
|---|---|---|
a. | a force but not a torque | |
b. | Neither a torque nor a force | |
c. | a force and torque | |
d. | a torque but not a force | |
Question number: 283
» Biology » Plant and Animal Nutrition
Question
Vermicomposting is done by using which organism?
Choices
| Choice (4) | Response | |
|---|---|---|
a. | Frog | |
b. | Amoeba | |
c. | Species of earthworm | |
d. | Lizard | |
Question number: 284
Question
On burning an element in air, forms an oxide. On dissolving this oxide in it forms an oxyacid. This oxide is a very good dehydrating agent and on reacting with caustic soda, it forms salt but no salt-formation takes place with . The oxyacid of the element is
Choices
| Choice (4) | Response | |
|---|---|---|
a. | hypo phosphorus acid | |
b. | phosphorus acid | |
c. | boric acid | |
d. | phosphoric acid | |