Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Chemistry 9 icse > Revision > Flashcards

Revision Flashcards

1
Q

The universal solvent

A

water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

A homogeneous mixture of solute in a solvent

A

solution

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

A solution in which the amount of solute is relatively large

A

concentrated solution

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what is the nature of true solution?

A

it is clear, transparent and homogeneous

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

The 3 metals which can react with cold water to produce HYDROGEN

A

K, Na, Ca

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

The metal which reacts reversibly with steam to produce HYDROGEN

A

IRON

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Which of the foloowing does not give hydrogen on reacting with dilute HCl?
Cu, Zn, Fe, Mg

A

Copper

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Potassium is kept in kerosene oil because

A

It reacts with the moisture in air and catches fire

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

1 atm is qual to ______ torr

A

760 torr

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

At high altitude atmospheric pressure is _____

A

low

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Pressure -temperature relationship is given by

A

Charles law

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

If pressure is doubled for a fixed mass of a gas, volume will become

A

half times

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the physical state of bromine?

A

liquid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

how many electrons are present in the outermost orbit of alkaline earth metals?

A

two

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Which element of group 17 is solid in nature?

A

iodine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

down the group metallic character :

A

increases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Respiration is an example of which type of reaction? exothermic or endothermic?

A

exothermic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Name the acid that is released when a bee stung our body

A

formic acid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Name the least reactive element among halogens

A

iodine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

The products obtained by thermal decomposition of Calcium carbonate

A

Calcium oxide and carbon dioxide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

How many physical states of water exist?

22
Q

chemical formula of Glauber’s salt

A

Na2SO4.10H2O

23
Q

The acid used in drying of gases

A

conc H2SO4

24
Q

with the rise in temperature the solubility of sodium chloride in water:

A

increases only a little

25
The mass ratio of Hydrogen to oxygen in water
1:8
26
The catalyst and the promotor used for the formation of ammonia gas is:
Fe and Mo respectively
27
When crystals of lead nitrate are heated strongly in a dry test tube, a ______colour residue is left
yellow
28
The salt that undergoes photchemical decomposition is
silver nitrate
29
A subsatnce that does not contain water of crystallization is salts: blue vitriol, washing soda crystals, common salt and Glauber's salt
common salt
30
Ferric chloride is ______ salt
deliquescent
31
How many electrons do the outermost shell of an atom accommodate?
8
32
Which of the following is a covalent compound? sodium chloride, carbon tetrachloride, magnesium chloride, calcium chloride
carbon tetrachloride
33
The bond formed between nitrogen atoms in a molecule is :
Triple covalent bond
34
Calcium is not used in laboratory preparation of hydrogen because:
It is very expensive
35
Which metal is given hydrogen on reacting with water, acid and alkali? Fe,Mg, Zn, Pb
Zinc
36
Nitric acid is not used in the preparation of hydrogen from metals. Why?
It is a powerful oxidising agent and oxidizes the the hydrogen formed to water
37
Two metals which can react with very dilute HNO3 at low tempeartures
Mg and Mn
38
What willl be the minimum pressure required to compress 2L of gas at 1 bar to 1L at 25°C
2 bar
39
The absolute temperature that corresponds to 26°C
299K
40
On adding water to sodium the solution formed is
alkaline
41
The gas which has rotten egg smell
H2S
42
Hydrogen is collected through ____________________ method
Water displacement method
43
Name : The substance that can remove combined elements of water in the ratio of 2:1 ( H and O) from a compound.
Dehydrating agent
44
Elements of group IIIB ( gp no. 3) of the seventh period.
Actinides
45
Elements that have two outermost shells incomplete
Transition elements
46
The process in which an atom or ion loses electron
oxidation
47
A substance that transfers hydrogen to another substance, or removes oxygen from that substance
Reducing agent
48
The force that a gas exerts in unit cross-sectional area on the walls of its container
Pressure
49
The process of gradual mixing of two substances kept in contact by molecular motion
diffusion
50
The elements of lanthanides and actinides collectively known as
Inner transition elements

Chemistry 9 icse (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions