Z number for chlorine is __________?

A. 35.5
B. 17
B. 15
D. 21

Submitted by: Aamir khan Hullio

Chlorine is a chemical element with the symbol Cl and atomic number 17. The second-lightest of the halogens, it appears between fluorine and bromine in the periodic table and its properties are mostly intermediate between them. Chlorine is a yellow-green gas at room temperature.

Related Mcqs:

Which of the following terms is used for the mass of chlorine 35.5 ?
A. relative atomic mass
B. mass number
C. atomic weight
D. relative isotopic mass
A single chlorine free radical can destroy how many ozone molecules ?
A. 10
B. 100
C. 10000
D. 100000
Consider the following reaction- 2KCIO3 + H2C2O4 + H2SO4 ? K2SO4 + 2H2O + 2CO2 + Oxide Which oxide of chlorine is produced in the above reaction ?
A. Cl2O
B. ClO2
C. Cl2O6
D. Cl2O7
Which is the paramagnetic oxide of chlorine ?
A. Cl2O7
B. Cl2O6
C. ClO2
D. all
The colour of chlorine gas is_______________?
A. pale yellow
B. freenish yellow
C. reddish brown
D. grayish black
Chlorine Cl when attached to benzene has________?
A. +I and +R effect
B. -1 and +R effect
C. +1 and -R effect
D. -I and -R effect
Submitted by: Muhammad Ali Kunbhar
The PH of milk is __________?
A. 6.0
B. 6.5
C. 7.0
D.7.5
Submitted by: Muhammad Ali Kunbhar
When an aldehyde is reacted with hydrogen cyanide a ” Cyanihydrin” is formed. This process is best termed as __________?
A. Electrophilic addition
B. Electrophilic substitution
C. Nucleophilic addition
D. Necleophilic substitution
Submitted by: Muhammad Ali Kunbhar
Alpha (α) particles are helium (He) nucleus with a charge of __________ ?
A. e
B. 2e
C. 3e
D. 4e
Submitted by: Rashid Mehmood
In SI base units, 1 Bq is equal to __________ ?
A. 10 disintegration per second
B. 1.5 disintegration per second
C. 0.01 disintegration per second
D. 1 disintegration per second
Submitted by: Rashid Mehmood