-
Question 1/30
1 / -0
During rainy seasons why do doors made up of wood swell up?
-
Question 2/30
1 / -0
Petroleum is a Mixture of –
-
Question 3/30
1 / -0
Who discovered cement?
-
Question 4/30
1 / -0
Which chemical is used for preserving fruit juices?
-
Question 5/30
1 / -0
The amount of chlorine available in water after disinfection called as
-
Question 6/30
1 / -0
The temperature of oxy–acetylene flame is around–
-
Question 7/30
1 / -0
What is the number of unpaired electrons in carbon atom?
-
Question 8/30
1 / -0
Atoms having same no of neutron but different no of electrons or protons are called –
-
Question 9/30
1 / -0
By whom was the absolute value of charge on electron determined?
-
Question 10/30
1 / -0
Which chemical is used in foam fire extinguishers?
-
Question 11/30
1 / -0
The fundamental particles that composed on atom are–
-
Question 12/30
1 / -0
Process of Removal of calcium and Magnesium is known as –
-
Question 13/30
1 / -0
The branch of medicine involving synthetic chemical compounds is–
-
Question 14/30
1 / -0
In the treatment of skin disease the radio isotope used is–
-
Question 15/30
1 / -0
Hygroscopic objects are those which instantly absorb–
-
Question 16/30
1 / -0
Electrolysis of copper sulphate solution with copper electrodes gives–
-
Question 17/30
1 / -0
The ore only two metals that are Non–Silver in colour, they are–
-
Question 18/30
1 / -0
A mixture of camphor and benzoic acid can be easily separated by which method?
-
Question 19/30
1 / -0
The addition of Gypsum to Portland cement helps in–
-
Question 20/30
1 / -0
Main Constituent of air is–
-
Question 21/30
1 / -0
Which type of reaction produces the most harmful radiation?
-
Question 22/30
1 / -0
Where is Pakistan’s nuclear power plant located?
-
Question 23/30
1 / -0
In an atomic nucleus, by which force are neutrons and protons held together?
-
Question 24/30
1 / -0
What does Hydrogen fuel cell vehicles produce as “exhaust”?
-
Question 25/30
1 / -0
When a bond is formed between two atoms, the energy so system will be–
-
Question 26/30
1 / -0
The antiseptic compound present in Dettol is –
-
Question 27/30
1 / -0
By which Carbon and hydrogen are estimated in organic compounds?
-
Question 28/30
1 / -0
Which compound is commonly used as antifreeze in automobile radiators?
-
Question 29/30
1 / -0
Which acid is used in synthetic lemonade?
-
Question 30/30
1 / -0
The rusting of iron–