General Knowledge - Chemistry
Exam Duration: 45 Mins Total Questions : 30
Which of the following is not an element?
- (a)
Sodium
- (b)
Gold
- (c)
Soil
- (d)
Carbon
Which of the following is least compressible?
- (a)
Gas
- (b)
Liquid
- (c)
Solid
- (d)
None of these
The state in which molecular attractions are very strong is
- (a)
solid
- (b)
liquid
- (c)
gas
- (d)
none of these
Intermolecular space is the least in
- (a)
water
- (b)
steam
- (c)
ice
- (d)
all of them
Which of the following acids is called the king of acids?
- (a)
Acetic acid
- (b)
Phosphoric acid
- (c)
Oxalic acid
- (d)
Sulphuric acid
Which of the following is a strong acid?
- (a)
Nitric acid
- (b)
Citrus acid
- (c)
Formic acid
- (d)
Lactic acid
Mild of magnesia is an
- (a)
acid
- (b)
ant acid
- (c)
alkali
- (d)
rock salt
pH to tomato juice is 4, that means it is
- (a)
basic
- (b)
acidic
- (c)
neutral
- (d)
none of these
A solution of sodium chloride will turn
- (a)
red litmus blue
- (b)
blue litmus red
- (c)
red litmus orange
- (d)
not change the colour of either red or blue litmus
Which of the following is spread on icy roads to melt ice in cold countries?
- (a)
Sodium bicarbonate
- (b)
Rock salt
- (c)
Sodium hydroxide
- (d)
None of these
Which amongst the following is not an alkaline earth metal?
- (a)
Mg
- (b)
Ba
- (c)
Fr
- (d)
Sr
The fraction of petroleum used as jet fuel is
- (a)
petrol
- (b)
kerosene
- (c)
diesel
- (d)
alcohol
The chemical added of LPG to help detect its leakage is
- (a)
isobutene
- (b)
ethylamine
- (c)
methyl mercaptan
- (d)
ethyl mercaptan
Which of the following is not true about Biogas?
- (a)
It contains Methane
- (b)
Burns without smoke
- (c)
Leaves ash behind
- (d)
Produced by anaerobic decomposition of animal and plant waste
The lowest temperature at which a combustible substance catches fire?
- (a)
Critical Temperature
- (b)
Absolute temp
- (c)
Ignition temp
- (d)
None of these
An Allotropic from of carbon used for cutting and drilling is
- (a)
charcoal
- (b)
bone charcoal
- (c)
graphite
- (d)
diamond
Limestone on heating gives
- (a)
washing soda
- (b)
plaster of Paris
- (c)
quicklime
- (d)
slaked lime
Which one of the following is a mixed fertilizer?
- (a)
Urea
- (b)
CAM
- (c)
Ammonium Sulphate
- (d)
NPK
Consider the following statements:
Coke is one of the materials of the charge added to blast furnace for the production of steel/iron. Its function is to
1. act as a reducing agent.
2. remove silica associated with the iron ore.
3. function as fuel, to supply heat.
4. act as an oxidizing agent Of these statements
- (a)
1 and 2 are correct
- (b)
2 and 4 are correct
- (c)
1 and 3 are correct
- (d)
3 and 4 correct
Which one of the following statements regarding starch and cellulose is NOT correct?
- (a)
Both of them are of plant origin
- (b)
Both of them are polymers
- (c)
Both of them give colour with iodine
- (d)
Both of them are made up of glucose molecules
Which one of the following metals does not form amalgams?
- (a)
Zinc
- (b)
Copper
- (c)
Magnesium
- (d)
Iron
Consider the following statements:
Glass can be etched or scratched by
1.. diamond
2. hydrofluoric acid
3. aquaregia
4. conc. Sulphuric acid
- (a)
1 and 4
- (b)
2 and 3
- (c)
1 and 2
- (d)
2 and 4
The following items consist of two statements, one labeled as the 'Assertion (A)' and the other as 'Reason (R)'. You are to examine there two statements carefully and select the answer to these items using the code give below:
Assertion (A): Large cold storage plants use ammonia as refrigerant while domestic refrigerators use chlorofluoro-carbons.
Reason (R): Ammonia can be liquefied at ambient temperatures at low pressures
- (a)
Both A and R are true and R is the correct explanation
- (b)
Both A and R are true but R is NOT the correct explanation of A
- (c)
A is true but R is false
- (d)
A is false But R is true
Aluminium surfaces are often 'anodized'.This means the deposition of a layer of
- (a)
chromium oxide
- (b)
aluminium oxide
- (c)
nickel oxide
- (d)
zinc oxide
A small pouch containing silica gel is often found in bottle of medicine in tablet or powder form because silica gel
- (a)
kills bacteria
- (b)
kills germs and spores
- (c)
absorbs moisture
- (d)
absorbs all gases present inside the bottle
Most of the explosions in mines occur due to the mixing of
- (a)
hydrogen with oxygen
- (b)
oxygen with acetylene
- (c)
methane with air
- (d)
carbon dioxide with ethane
In an atom, the order of filling up the orbitals is governed by
- (a)
Aufbau priciple
- (b)
Heisenberg's uncertainty priciple
- (c)
Hund's rule
- (d)
Pauli's exclusion principle
Consider the following statements:
The purpose of adding sodium sulphate and sodium silicate to the detergent in a washing powder is.
1. to keep the washing powder dry.
2. to maintain the alkalinity of the powder.
Which of these statements is/are correct?
- (a)
Only 1
- (b)
Only 2
- (c)
Both 1 and 2
- (d)
Neither 1 nor 2
Which are the materials generally employed as solder in soldering operation in electronics?
- (a)
Iron and tin
- (b)
Lead and tin
- (c)
Aluminium and lead
- (d)
Aluminium and iron
Which one of the following non-metals is not a poor conductor of electricity?
- (a)
Sulphur
- (b)
Selenium
- (c)
Bromine
- (d)
Phosphorus