Download App

Magnetic Effects of Electric Current — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceMagnetic Effects of Electric Current5 Marks
Question
Write the main difference between an acid and a base. With the help of suitable examples the term  neutralization and the formation of:
  1. Acidic
  2. Basic
  3. Neutral salts.
✓

Answer

Acid
Base
1
An acid produces H+ ions in aqueous solution.
A base produces OH-ions in aqueous solution.
2
Acids are sour in taste.
Bases are bitter in taste.
3
Acids change the colour of blue litmus to red.
Bases change the colour of red litmus to blue.
Neutralization - A reaction of an acid with a base to produce salt and water.
  1. $\text{Acidic}-\text{NH}_4\text{OH}\ +\ \text{HCl}\xrightarrow{ \ \ \ \ \ \ \ }\text{NH}_4\text{Cl}+\text{H}_2\text{O}$
  2. $\text{Basic}-\text{NaOH}\ +\ \text{H}_2\text{CO}_3\xrightarrow{ \ \ \ \ \ \ \ }\text{Na}_2\text{CO}_3+\text{H}_2\text{O}$
  3. $\text{Neutral}-\text{KOH}\ +\ \text{HNO}_3\xrightarrow{ \ \ \ \ \ \ \ }\text{KNO}_3+\text{H}_2\text{O}$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Answer the questions.[Phy-5M]" from Magnetic Effects of Electric Current→Magnetic Effects of Electric Current — all question types→Science STD 10 question papers→CBSE Board STD 10 question papers→CBSE Board question paper generator→

Similar questions

  1. To construct a ray diagram we use two rays which are so chosen that it is easy to know their directions after reflection from the mirror. List two such rays and state the path of these rays after reflection in case of concave mirrors. Use these two rays and draw ray diagram to locate the image of an object placed between pole and focus of a concave mirror.
  2. A concave mirror produces three times magnified image on a screen. If the object is placed 20 cm in front of the mirror, how far is the screen from the object?
→
The gravitational pull of the moon cause the sea-water to rise periodically.
  1. What name is given to the condition of the sea when water to rise periodically.
  2. What name is given to the condition of the sea when its raised water recedes?
  3. What name is given to the energy which can be harnessed from this natural phenomenon?
  4. Draw labelled diagram to show how this energy can be harnessed from this natural.
→
One-half of a convex lens is covered with a black paper. Will this lens produce a complete image of the object? Verify your answer experimentally. Explain your observations.
→
In the circuit given below:

 

  1. What is the combined resistance?
  2. What is the p.d. across the combined resistance?
  3. What is the p.d. across the $3 Ω$ resistor?
  4. What is the current in the $3 Ω$ resistor?
  5. What is the current in the $6 Ω$ resistor?
→
The variation of image distance (v) with object distance (u) for a convex lens is given in the following observation table. Analyse it and answer the questions that follow:
S.NO.Object distance (u) cmImage distance (v) cm
1-150+30
2-75+37.5
3-50+50
4-37.5+75
5-30+150
6-15+37.5

i. Without calculation, find the focal length of the convex lens. Justify your answer.
ii. Which observation is not correct? Why? Draw ray diagram to find the position of the image formed for this position of the object.
iii. Find the approximate value of magnification for $u=-30 \mathrm{~cm}$.
→
State whether an electric heater will consume more electrical energy or less electrical energy per second when the length of its heating element is reduced. Give reasons for your answer.
→
Differentiate between nuclear fission and nuclear fusion.
→
  1. To construct a ray diagram we use two light rays which are so chosen that it is easy to know their directions after reflection from the mirror. List these two rays and state the path of these rays after reflection. Use these two rays to locate the image of an object placed between infinity and the centre of curvature of a concave mirror.
  2. Draw a ray diagram to show the formation of image of an object placed between the pole and principal focus of a concave mirror. How will the nature and size of the image formed change, if the mirror is replaced by a converging lens of same focal length?
→
One-half of a convex lens of focal length 10cm is covered with a black paper. Can such a lens produce an image of a complete object placed at a distance of 30cm from the lens? Draw a ray diagram to justify your answer. A 4cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 20cm. The distance of the object from the lens is 15cm. Find the nature, position and size of the image.
→
  1. A student is unable to see clearly the words written on the black board placed at a distance of approximately 3m from him. Name the defect of vision the boy is suffering from. State the possible causes of this defect and explain the method of correcting it.
  2. Why do stars twinkle? Explain.
→