Online NAT IE Pre Engineering Chemistry Test Preparation for Pakistani Students

NAT I Engineering Chemistry

Sr. #	Questions	Answers Choice
1	Which is the most volatile compound?	HI HCI HBr HF
2	Sea weeds are important source of	Iron Chlorine Iodine Bromine
3	When sulphur is boiled with Na₂SO₃solution the compound formed is	Sodium sulphides Sodium sulphates Sodium persulphate Sodium thiosulphate
4	Oleum is	Castor oil Oil of vitriol Fuming of H<sub>2</sub>SO<sub>4</sub> None of them
5	The number of unpaired electrons in the P-subshell of oxygen atom	1 2 3 4
6	Ozone is not	An allotrope A powerful oxidizing agent Paramagnetic A bent molecule
7	Which of the following is acidic?	SO<sub>3</sub> N<sub>2</sub>O BeO HgO
8	Which of the following fluorides does not exist?	NF<sub>5</sub> PF<sub>5</sub> AsF<sub>5</sub> SbF<sub>5</sub>
9	Which one of the following compounds does not exist?	NCI<sub>5</sub> AsF<sub>5</sub> SbCI<sub>5</sub> PF<sub>5</sub>
10	BiCI₃ on hydrolysis forms a white precipitate of	<span style="font-size: 14.44444465637207px;">Bismuthio is acid</span> <span style="font-size: 14.44444465637207px;">Bismuth oxychloride</span> <span style="font-size: 14.44444465637207px;">Bismuth pentachloride</span> <span style="font-size: 14.44444465637207px;">Bismuth hydroxide</span>