Fifteen Persons Among Whom Are A And B Sit Down At Random At A Round Table The Probability That There Are 4 Persons Between A And B Is
1) 1/3 2) 2/3 3) 2/7 4) 1/7 Solution: Option (4) 1/7 Total cases = (15-1)! = 14! If 4... View Article
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A Word Consists Of 11 Letters In Which There Are 7 Consonants And 4 Vowels If 2 Letters Are Chosen At Random Then The Probability That All
1) 5/11 2) 21/55 3) 4/11 4) None of these Solution: Option (1) 21/55 Total cases = 11C2 Favourable cases... View Article
From A Class Of 12 Girls And 18 Boys Two Students Are Chosen Randomly What Is The Probability That Both Of Them Are Girls
1) 22/145 2) 13/15 3) 1/18 4) None of these Solution: Option (1) 22/145 Total cases = 30C2 Favourable cases... View Article
A Box Contains 25 Tickets Numbered 1 2 25 If Two Tickets Are Drawn At Random Then The Probability That The Product Of Their Numbers Is Even Is
1) 11/50 2) 13/50 3) 37/50 4) None of these Solution: Option (3) 37/50 Given that, the two tickets are... View Article
Six Cards Are Drawn Simultaneously From A Pack Of Playing Cards What Is The Probability That 3 Will Be Red And 3 Black
1) 26C6 2) 26C3/52C6 3) (26C3 . 26C3)/52C6 4) 1/2 Solution: Option (3) (26C3 . 26C3)/52C6 Total cases = 52C6... View Article
Two Cards Are Drawn At Random From A Pack Of 52 Cards The Probability That Both Are The Cards Of Spade Is
1) 1/26 2) 1/4 3) 1/17 4) None of these Solution: Option (4) 1/17 Total number of cards in a... View Article
26 Cards Numbered From 1 To 26 One Card Is Chosen Probability That It Is Not Divisible By 4 Is
1) 3/13 2) 4/13 3) 2/13 4) 10/13 Solution: Option (4) 10/13 Total number of cards = 26 The number... View Article
Why Is The Second Ionization Energy Higher Than The First
The second ionization energy is higher than the first ionization energy. For second ionisation we have to remove electrons from... View Article
Why Does Phenol Does Not Decompose With Nahco3 To Evolve Co2
Phenol is a weak acid, so does not react with sodium hydrogen carbonate to evolve CO2.
How Does Temperature Affect Nernst Equation
Temperature does not affect Nernst equation. The variation of cell potential is linear with temperature. Nernst equation shows that cell... View Article
How Do You Solve An Augmented Matrix
Augmented matrix is derived from the system of linear equations. The coefficients of variables are placed at the first three... View Article
Is Pcl5 An Electrophile
Electrophiles is one of the chemical species that either donate or accept electrons to form a new chemical bond. PCl5... View Article
What Is The Solution Of A Linear System
The solution of a linear system is the set of all possible values to the variables that each of the... View Article
What Is A Metalloid In Group 13
Boron, the only metalloid in Group 13. Group 13 is known as the boron group. Boron is capable of gaining... View Article
Why Is It Called Linear Programming
It is called so because it has extensive use in combinatorial optimization. Linear programming is a method of optimizing operations... View Article
How Do You Find R In Coulombs Law
Coulomb’s law explains the force is relative to the ratio of q1, q2, 1/r2. Here r is the distance between... View Article
What Is The Difference Between Elimination And Substitution Reactions
The difference between substitution and elimination reactions is that substitution responses one replacement with another while elimination reactions simply remove... View Article
Which Hydrides Is Not Reducing Agent
Which of the following hydrides is not reducing agent a)H2S b)H2O c)H2Te d)H2Se? Answer: (b) The reducing character of an... View Article
Which Of The Following Ion Has The Largest Size
Which of the following ion has the largest size (a) Al+3 (b) O-2 (c) Cs+ (d) F– Answer: (c) In... View Article
What Is Lanthanoid Contraction
When the size of lanthanide ions decrease because of increase in its atomic number is called lanthanide contraction. Students are... View Article
