Which of the following quantum number is known as orbital orientation quantum number?
Anonymous Quiz
47%
Magnetic quantum number
27%
Angular quantum number
18%
Spin quantum number
8%
Principal quantum number
Which of the following element can form both a cation and anion?
Anonymous Quiz
7%
Magnesium
10%
Sodium
73%
Hydrogen
10%
Oxygen
Which one of the following is not general properties of ionic compounds?
Anonymous Quiz
14%
They don't contain molecules.
17%
They have relatively high melting and boiling points.
19%
They can conduct electric currents when molten or in aqueous solution.
50%
They are soluble in non- polar solvents.
Which of the following element can not form ionic compound with oxygen?
Anonymous Quiz
9%
Magnesium
11%
Calcium
31%
Rubidium
50%
Sulphur
When hydrogen and chlorine atoms are companied to form covalent bond, how many lone - pairs and bonding - pairs are there in HCl compound respectively?
Anonymous Quiz
25%
1 and 3
58%
3 and 1
13%
1 and 2
4%
2 and 1
🥰3
Which one of the following molecule can form triple bond?
Anonymous Quiz
10%
Hydrogen molecule
7%
Chlorine molecule
74%
Nitrogen molecule
10%
Fluorine molecule
Which one of the following is the longest period in the periodic table?
Anonymous Quiz
8%
Period 3
15%
Period 5
44%
Period 7
34%
Period 6
What is the molecular geometry of O₃ ?
Anonymous Quiz
34%
Trigonal planar
41%
Bent
19%
Trigonal pyramidal
6%
Tetrahedral
What is the molecular shape of BrF₄⁻ ?
Anonymous Quiz
6%
Bent
25%
See saw
58%
Square planar
11%
Octahedral
How many sigma and pi bonds are there in ethylene ( C₂H₄) ?
Anonymous Quiz
39%
5 sigma and 1 pi
28%
4 sigma and 2 pi
17%
5 sigma and 2 pi
16%
6 sigma and 1 pi
❤4
G-12 Unit 2 Exercise .pdf
94.9 KB
Maths grade 11 and 12 unit 2 exercise
Consider the following chemical equation:
PCl₅ + H₂O ------>H₃PO₄ + HCl.
Then what is the coefficient of HCl after balancing of chemical equation?
PCl₅ + H₂O ------>H₃PO₄ + HCl.
Then what is the coefficient of HCl after balancing of chemical equation?
Anonymous Quiz
14%
4
20%
1
57%
5
8%
3
For endothermic reactions, change in enthalpy (∆H) is:
Anonymous Quiz
80%
Positive
12%
Negative
6%
Zero
2%
Not determined
How many moles of CaO are needed to react with excess water to produce 370 g of calcium hydroxide?
Anonymous Quiz
8%
4 mol
43%
5 mol
38%
12.4 mol
10%
3.033 mol
How many liters of sulphur trioxide are formed when 4800 cm³ of sulphur dioxide is burned in air?
Anonymous Quiz
16%
48 L
33%
480 L
41%
4.8 L
10%
0.48 L
When 20g of sulphur dioxide reacts with oxygen, 23 g of sulphur trioxide is formed. What is the percentage yield?
Anonymous Quiz
12%
80%
43%
84%
26%
75%
18%
92%
❤4
❤1
The reactions in which oxidation and reduction do not occur and such types of reactions are known as ___________.
Anonymous Quiz
8%
Redox reactions
12%
Oxidizing agents
5%
Reducing agents
74%
Non - redox reactions