Question is ⇒ The mass number of an atom is equal to, Options are ⇒ (A) the number of protons, (B) the number of protons and electrons, (C) the number of nucleons, (D) the number of neutrons, (E) , Leave your comments or Download question paper.

Question is ⇒ The mass number of an atom is equal to, Options are ⇒ (A) the number of protons, (B) the number of protons and electrons, (C) the number of nucleons, (D) the number of neutrons, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	The mass number of an atom is equal to
A.	the number of protons [Wrong Answer]
B.	the number of protons and electrons [Wrong Answer]
C.	the number of nucleons [Correct Answer]
D.	the number of neutrons [Wrong Answer]
View Answer 1 -1 Explanation:- Answer : C Discuss it below : !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments

Previous question Next question

Also Read Similar Questions Below :

⇒ The most commonly used bleaching agent is
alcohol
carbon dioxide
chlorine
sodium chlorine

⇒ The formula CH-CO-CHrepresents
Acetone
Acetic acid
Acetophenone
Phenyl acetate

⇒ The number of d-electrons in Fe(Z = 26) is not equal to that of
p-electrons in Ne(Z = 10)
s-electrons in Mg(Z = 12)
d-electrons in Fe(Z = 26)
p-electrons in CI(Z = 17)

⇒ The main chemical constituent of clay is
silicon oxide
aluminium borosilicate
zeolites
aluminium silicate

⇒ The method of concentrating the ore which makes use of the difference in density between ore and impurities is called
liquation
leaching
levigation
magnetic separation

⇒ The main chemical constituent of the oil of cardamom which is responsible for flavour of this oil is
cineole
engenol
geraniol
limonene

⇒ The most electropositive elements among the following is
Na
Ca
K
Cs

⇒ The oil used in the froth floatation process is
coconut oil
olive oil
kerosene oil
pine oil

⇒ The major constituent of air is
Nitrogen
Carbon dioxide
Oxygen
Hydrogen

⇒ The names of the scientists, Newlands, Mendeleev, and Meyer are associated with the development of
atomic structure
metallurgy
periodic table of contents
discovery of elements

⇒ The metal that is usually extracted from sea water is
Ca
Na
K
Mg

⇒ Zone refining is used for the purification of
Au
Ge
Ag
Cu

⇒ The most abundant rare gas in the atmosphere is
He
Ne
Ar
Xe

⇒ Which among the following is not a noble gas?
Argon
Radon
Neon
Bromine

⇒ The number of g-molecule of oxygen in 6.02 x 10CO molecules is
1 gram of molecule
0.5 gram of molecule
5 gram of molecule
10 gram of molecule

⇒ The main active constituent of tea and coffee is
nicotine
chlorophyll
caffeine
aspirin

⇒ The organic reaction represented by equation CH- CH = O + HNOH gives CH- CH - NH + HO is an example of
an addition reaction
a condensation reaction
an oxidation reaction
an elimination reaction

⇒ The metal used to recover copper from a solution of copper sulphate is
Na
Ag
Hg
Fe

⇒ The Latin wordmeans ant. The name formic acid is derived from this Latin word because
this acid, in ancient times, was used to eliminate ant-hills
this corrosive acid is secreted by ants to drive away their enemies
this acid was first obtained by the distillation of ants
ants are attracted by the odour of this acid

⇒ What is the chemical name of bleaching powder?
Calcium carbonate
Calcium hypochlorite
Calcium phosphate
Calcium cyanamide

⇒ Which of the following is incorrect?
Mercury: Hg
Silver: Ag
Sodium: Na
Potassium: Ka

⇒ The mass number of a nucleus is
always less than its atomic number
the sum of the number of protons and neutrons present in the nucleus
always more than the atomic weight
a fraction

⇒ The metal that is used as a catalyst in the hydrogenation of oils is
Ni
Pb
Cu
Pt

⇒ The National Chemical Laboratory is situated in
New Delhi
Bangalore
Pune
Patna

⇒ The inherited traits of an organism are controlled by
RNA molecules
nucleotides
DNA molecules
enzymes

⇒ The metallurgical process in which a metal is obtained in a fused state is called
smelting
roasting
calcinations
froth floatation

⇒ The mass of one Avogadro number of helium atom is
1.00 gram
4.00 gram
8.00 gram
4 x 6.02 x 1023 gram

⇒ The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is
Dalton's law
Gay Lussac's law
Henry's law
Raoult's law

⇒ The following are the half lives of four active isotopes. Which one of the following is the most dangerous to handle?
3 billion years
100 years
0.01 minute
13 days

⇒ The number of waves in n x 10Bohr's orbit are
n2
n
n-2
n3