i) Calcium hydroxide + carbon dioxide → Calcium carbonate + water Ca(OH)2 + Co2 →  CaCo3 + H2O ii) Zinc + Hydrochloric acid → Zinc Chloride + Hydrogen Zn + 2HCI → ZnCl2 + .....

Given, 3x - 4 = x – 8 or, 3x - x = -8 + 4 or, 2x = -4 or, x = -42 or, x = -2 .....

Here, we have been given two ratios with one missing number. We have been asked to find the missing number. At first let us write down given information: Given,  4:_ = 8: 18 Let the missing number be x. So ratios will be  4: x = 8: 18 Now, .....

Given, 4a + 53 = a + 4 2 or,4a + 53 × 3=a + 4 2 × 2 or, 4a + 5=3a + 42 or, 4a + 5× 2 = 3a + 122 × 2 or, 6a + 10 = 3a + 12 or, 6a – 3a = 12 – 10 or, 3a = 2 or, a .....

Here, we have been given two ratios. We have been asked to find whether they are in proportion or not. At first let us write down given information: Given,  5:6 and 2:3 To be in proportion the ratio of first two numbers should be equal to ratio .....

Let, Shyam has Rs.x and Ram has Rs.3x. Money given by Ram to Shyam=3x4 Total amount with Shyam=x+3x4                             .....

Mohan .....

Bhimsen .....

Here, we have been given the series of number. We have been asked to find the value of second proportional. At first let us write down given information: Given,  2, 3, 12 Let second proportional be x.  So, series will be 2, x, 3, .....

Here, we have been given the ratio of male and female teacher. We have been asked to find the number of male teachers where number of female teachers is given. At first let us write down given information: We have,  Male teacher: female teacher .....

Let, the present age of son=x years The present age of father=2x years Ten years ago, Age of son=x-10 years, and Age of father=2x-10 years. Now, by the question, 2x-10=3x-10 or, 2x-10=3x-30 or, 3x-2x=30-10 or, x=20 Hence, the age of the son is 20 .....

Subcutaneous layer is the layer of fat supplied with blood vessels that retains heat inside the .....

All alkalis are the bases but all bases are not alkalis because all the bases are not readily soluble in .....

RIS  ANLAK                SRI  .....

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The number of times that a shape comes to its original shape in a complete turn is called the order of rotational .....

Here, we have been given the series of number. We have been asked to find the value of first proportional. At first let us write down given information: Given,  2, 4, 8 Let first proportional be x.  So, series will be x, 2, 4, .....

Here, we have been given the ratio of length to breadth. We have been asked to find the value of length where value of breadth is given. At first let us write down given information: We have,  Length to breadth = 4: 5 Breadth (b) = 20 cm Length .....

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We have, 3x+10-x+5=2x+3-x-9+14 or, 3x+10-x-5=2x+6-x+9+14 or, 2x+5=x+29 or, 2x-x=29-5 ∴x=24 .....

The change of state from liquid to gas is called .....

The change of state from gas to liquid is called .....

लि     +     म्बू     =    .....

Here, 34x-1+x3-3712=6+x4 or, 12x-3+x3-3712=6+x4 or, 12x+x3-x4=6+3+3712 or,12x×12+4x-3x12=9×12+3712 or, 145x=145 or, .....

The harmful living organisms such as insects, rats, fungi, etc. are called .....

Electrolysis is the process of decomposition of electrolyte either in the state of fusion or of solution, when electric current is passed through .....

थो     +     प्लो     =      .....

Let the sides AB, BC, and CA of  △ ABC be represented by the equations x + y = 2, 3x - 4y = 6 and x - y = 0 respectively. Solving x + y = 2 and 3x - 4y = 6, we get B(2, 0) Solving 3x - 4y = 6 and x - y = 0, we get C(-6, -6). Solving .....

We have, x+12=x-32+12 or, x2+2.x.1+12=x2-2.x.3+32+12 or,x2+2x+1=x2-6x+9+12 or, 2x+8x=21-1 or, .....

गु     +     च्छा      =    .....

The main factors that bring out a chemical change are: •    Heat •    Electricity •    light •    Simple contact •    Contact by .....

स्ले     +     ट     =    .....

फ्र     +     क     =      .....

Here, we have been given two ratios. We have been asked to find the value of x. At first let us write down given information: Given,  2: 3 = x: 6 So, we can write 2/3 = x/6 Let us perform cross-multiplication operation, 12 = 3x Let us send 3 to .....

Mount .....

A very long duration of time which helps to study the geological history of the earth is called a geological .....

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फ    +    लैँ    +    चा     =    .....

a) He has been informed of his mother’s death. b) We shall be on time, shan’t we? c) I warned the child not to look down into the well. d) Sunita will get ready for school. e) James asked Melina where she was going. .....

Since the vertically opposite angles are equal,  3x = 72° or, x = 72°3 or, x = 24°  ∴ x = .....

1. Money is collected by Varun.  2. The window was opened by Anita.  3. Our homework has been done by us.  4. A question will be asked by me.  5. The picture can be cut out by .....

The electrons which remain on the outermost orbit of the atom are called valence .....

We have, x+13+x+28+2x-111=3 or, 8×11x+1+3×11x+2+3×82x-13×8×11=3 or, 88x+88+33x+66+48x-24=3×264 or, 169x=792-88-66+24 or, .....

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Here, we have been given the ratio of cost of pen and pencil box. We have been asked to find the cost of pen where cost of pencil box is given. At first let us write down given information: We have,  Pen to pencil box = 3:4 Cost of pencil box = .....

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We have, x3-2≥3-x2 or,x3+x2≥3+2 or,2x+3x6≥5 or, 5x≥5×6 or, .....