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Find The Oxidation Number Of Sodium In NaCl

The oxidation number of Sodium-ion in NaCl is +1. The oxidation number of simple ions is equal to the charge on the ion. In sodium chloride... View Article

Write The Mathematical Relation Between Mobility And Drift Velocity Of Charge Carries In A Conductor Name

The mathematical relation between mobility and drift velocity of charge carriers in a conductor is given by In an ionized gas, the mobile... View Article

Check whether the following statement is true or false: Dividend = Divisor × Quotient + Remainder.

The statement is true. Dividend = Divisor × Quotient + Remainder... View Article

Find the sum of all odd numbers between 100 and 200.

The series is 101, 103, 105, …, 199. Let the number of terms be n. a = 101, d = 103 - 101 = 2, an = 199 an = a + (n - 1)... View Article

There are 5 books on Mathematics, 4 on physics. In how many ways these be placed on shelves if the books on the same subject are to be together?

The number of ways to arrange mathematics books together = 5! The number of ways to arrange physics books together = 4! ⇒ Total number of... View Article

Find the difference (5 / 7) – (2 / 7).

(5 / 7) - (2 / 7) = [5 - 2] / 7 = 3 / 7... View Article

Convert 4 radians into degree measure and also convert – 47 degree 30′ into radian measure.

To find the respective values.... View Article

A shopkeeper sold a TV set for Rs 17940 with a discount of 8% and earned a profit of 19.6%. What would have been the percentage of profit earned if no discount was offered?

Let the marked price of the TV set be Rs x. Discount = 8% Selling price of the TV = 92 % of Rs x = Rs (92X / 100) (92X /... View Article

The value of 512^-2/9 is

The given expression can be written as... View Article

The number of seats for admission is increased by 10 % every year. If the number of seats in 2001 was 400, what were the number of seats in 2003?

Number of seats in 2001 = 400 10% increased in 2002 from 2001 = 400 + 400 × (10 / 100) = 440 10% increase in 2003 from 2002 = 440 +... View Article

Convert 3π / 5 radian into sexagesimal system.

The value of... View Article

Solve the following (3x / 4) – (1 / 4) (x – 20) = (x / 4) + 32.

Consider the given expression.... View Article

Find the Median of 17, 23, 36, 12, 18, 23, 40 and 20.

Arranging in ascending order... View Article

Use the systematic method to solve the following equation 3 (x – 2) = 15.

3 (x - 2) = 15 Divide both the sides by 3 [3 (x - 2)] / 3 = 15 / 3 x - 2 = 5 x = 5 + 2 x = 7... View Article

Convert the fraction into decimal 5/8.

Answer: 0.625 In the decimal number system, the numbers are represented with base 10. The way of denoting the decimal numbers with base 10 is... View Article

The total number of subsets of the set {1, 3, 5, 7} is

Set = {1, 3, 5, 7} Number of elements in the set = 4 The number of subsets = 2n = 24 = 16... View Article

Simplify: [155 × 155 × 155 – 55 × 55 × 55] / [155 × 155 + 155 × 55 + 55 × 55]

The given expression is... View Article

Sunita is twice as old as Ashima. If six years is subtracted from Ashima’s age and four years added to Sunita’s age, then Sunita will be four times Ashima’s age. How old were they two years ago?

Let the present age of Ashima be ‘x’ years. The present age of Sunita is 2x years Ashima’s new age = (x - 6)... View Article

In how many ways can 6 prizes be distributed equally among 3 persons?

Total required number of ways is given by... View Article

In a large housing complex, there are 15 small buildings and 22 large buildings. Each of the large buildings has 10 floors with 2 apartments on each floor. Each of the small buildings has 12 floors with 3 apartments on each floor. How many apartments are there in all?

Number of large buildings = 22 Number of small buildings = 15 Number of floors in 1 large building = 10 Number of apartments on 1 floor = 2 Total... View Article