Which of the following is not propertie of magnetic field lines?
Anonymous Quiz
11%
They form closed loops.
23%
The direction of the magnetic field is tangent to the lines.
19%
They never cross each other.
47%
The closer the field lines to each other, the weaker the magnetic force.
❤5
What is(are) the solution(s) set of the absolute equation |3x + 2| - |x - 3| = 5 ?
Anonymous Quiz
24%
{ -5, 0, 3/2}
21%
{3/2}
25%
{0}
30%
{-5, 3/2}
❤1
If two roots of a quadratic equation are -2 and 3, then what is the quadratic equation?
Anonymous Quiz
30%
x² + 5x + 6 = 0
53%
x² - x - 6 = 0
11%
x² - 3x + 4 = 0
6%
x² + 3x - 4 = 0
Which of the following pairs of sets are disjoint?
Anonymous Quiz
45%
A= {1, 3, 2} and B = {5, 6, 7, 8}
24%
C = {a, b, c} and D = { a, b, c, d, e}
21%
E = { 1, {1, 2}} and F = {{2, 1}, 1}
10%
P = { 1, 3, 5, ...} and Q = { 2, 3, 5, 7...}
❤2
If U = {1, 2, 3, ..., 9} and A= { 2, 6, 8}. Then what is A' ?
Anonymous Quiz
17%
{1, 2, 3, 5, 7, 9}
25%
{6, 8}
25%
{1, 3, 5, 7, 9}
33%
{1, 3, 4, 5, 7, 9}
❤6
Suppose A and B are sets such that n(A) = 10, n(B) = 23 and n(A∩B) = 4, then which of the following is equal to n(A∆B)?
Anonymous Quiz
44%
25
19%
9
23%
16
13%
37
🥰5
Of 100 students, 65 are members of mathematics club and 40 are members of a physics club. If 10 are members of neither club, then how many students are members of both clubs?
Anonymous Quiz
9%
100
22%
105
52%
15
17%
50
🥰2
Of 100 staff members of a school, 48 drink coffee, 25 drink both tea and coffee and everyone drinks either coffee or tea. How many stuff members drink tea?
Anonymous Quiz
7%
73
39%
77
37%
52
17%
23
❤6🤔1
What is the molecular geometry of O₃ ?
Anonymous Quiz
30%
Trigonal planar
45%
Bent
19%
Trigonal pyramidal
6%
Tetrahedral
❤4🤔1
What is the molecular shape of BrF₄⁻ ?
Anonymous Quiz
13%
Bent
38%
See saw
39%
Square planar
11%
Octahedral
How many sigma and pi bonds are there in ethylene ( C₂H₄) ?
Anonymous Quiz
39%
5 sigma and 1 pi
35%
4 sigma and 2 pi
18%
5 sigma and 2 pi
8%
6 sigma and 1 pi
🥰4💯2
Change into passive voice:
He helps me every day.
Write your answer under the comment!
He helps me every day.
Write your answer under the comment!
❤1
🤔3👏1
Let A be a 3 × 3 triangular matrix and its diagonal elements are 1, 4, and 2. Then which one of the following is not true about its determinate?
Anonymous Quiz
14%
|A| = 8
23%
2|A| = 16
53%
|5A| = 45
10%
5|A| = 45
If matrix A is a 3 × 3 matrix and its 1st row elements are identical with 3rd row elements. Then matrix A is:
Anonymous Quiz
16%
An identity matrix
25%
Non- singular matrix
33%
Not invertible
26%
Symmetric matrix
A system of homogeneous equation always has:
Anonymous Quiz
46%
Trivial solution
23%
Non - trivial solution
14%
No solution
17%
Infinitely many solution
🔥5❤1
What is the magnetic field strength when a current of 6A flows in a wire 3m long and produces a force of 36N ?
Anonymous Quiz
6%
5 T
45%
6 T
36%
2 T
12%
3 T
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
16%
4
28%
1
48%
5
8%
3
❤1
For endothermic reactions, change in enthalpy (∆H) is:
Anonymous Quiz
75%
Positive
20%
Negative
5%
Zero
0%
Not determined
How many moles of CaO are needed to react with excess water to produce 370 g of calcium hydroxide?
Anonymous Quiz
16%
4 mol
29%
5 mol
48%
12.4 mol
7%
3.033 mol