AP DEECET-2026 Provisional allotment order released

July 23, 2026 |

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The AP DEECET 2026 exam was held on July 1, 2026, with results declared on July 8. Seat allotments for successful candidates were processed

Download Provisional allotment order here

MEGA PTM 4.0 Primary School Video Link

July 23, 2026 |

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MEGA PTM 4.0 Primary School Video Link

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మెగా పేరెంట్–టీచర్ మీటింగ్ (MPTM) 4.0 రోజున ఉదయం 9:30 గంటల నుండి 10:50 గంటల వరకు, *ప్రాథమిక పాఠశాలల్లోని* తరగతి గదుల్లో తల్లిదండ్రులు మరియు విద్యార్థుల సమక్షంలో IFPలు / స్మార్ట్ టీవీల ద్వారా ప్రదర్శించాలి ప్రదర్శించాల్సిన వీడియో.

MEGA PTM 4.0 Primary School Video Link

MEGA PTM 4.0 Secondary School Videos

July 23, 2026 |

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MEGA PTM 4.0 Secondary School Videos

To join My Telegram Channel Click here

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Facebook Click here

మెగా పేరెంట్–టీచర్ మీటింగ్ (MPTM) 4.0 రోజున ఉదయం 9:30 గంటల నుండి 10:50 గంటల వరకు, *సెకండరీ పాఠశాలల్లోని* తరగతి గదుల్లో తల్లిదండ్రులు మరియు విద్యార్థుల సమక్షంలో IFPలు / స్మార్ట్ టీవీల ద్వారా ప్రదర్శించాలి ప్రదర్శించాల్సిన వీడియో.

Secondary Schools Video Link Click here

10th Class Physics Chapter 3 Metal and Non Metals Textbook Questions and answers

July 22, 2026 |

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10th Class Physics Chapter 3 Metal and Non Metals Textbook Questions and answers

Question 1.Which of the following pairs will give displacement reactions ?

a) NaCl solution and copper metal

b) MgCl2 solution and aluminium metal

c) FeSO4 solution and silver metal

d) AgNO3 solution and copper metal

Answer:d) AgNO3 solution and copper metal.

Question 2.Which of the following methods is suitable for preventing an iron frying pan from rusting ?

a) Applying grease

b) Applying paint

c) Applying a coating of zinc

d) All of the above

Answer:d) All of the above

Question 3.An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be

a) calcium

b) carbon

c) silicon

d) iron.

Answer:a) calcium

Question 4.Food cans are coated with tin and not with zinc because

a) zinc is costlier than tin.

b) zinc has a higher melting point than tin.

c) zinc is more reactive than tin.

d) zinc is less reactive than tin.

Answer:c) zinc is more reactive than tin.

Question 5.You are given a hammer, a battery, a bulb, wires and a switch.

a) How could you use them to distinguish between samples of metals and non-metals?

b) Assess the usefulness of these tests in distinguishing between metals and non-metals.

Answer:

a) i) Metals can be spread into sheets with the help of hammer while non-metals give powder.

ii) When metals are connected into circuit using battery, bulb, wires and a switch current passes through the circuit and the bulb glows

b) Hammer is a reliable method because no non-metal can be spread into sheet.

Question 6.What are amphoteric oxides? Give two examples of amphoteric oxides.

Answer: Such oxides with react, both with acids as well as bases, to form salts and water, are known as amphoteric oxides. For example, aluminium oxides and zinc oxides.

ZnO + 2HCl → ZnCl2 + H2OZnO + 2NaOH → Na2ZnO2 + H2O

Question 7.Name two metals which will displace hydrogen from dilute acids and two metals which will not.

Answer:

Metals like sodium and magnesium displace hydrogen from dilute acids (metals) above hydrogen in the activity series.

Metals below hydrogen in the activity series like copper and silver do not displace hydrogen from dilute acids

Question 8. In the electrolytic refining of a metal M, what would you take as the anode, the cathode and the electrolyte ?

Answer:

Cathode : Pure metal

Anode : Impure metal

Electrolyte : Metal Salt solution

Question 9.Pratyush took sulphur powder on a spatula and heated it. He collected the gas evolved by inverting a test tube over it, as shown in the figure below.

a) What will be the action of gas on

i) Dry litmus paper.

ii) moist litmus paper.

b) Write a balanced chemical equation for the reaction taking place.

Answer:a) i) Dry litmus paper – No action

ii) Moist litmus paper – becomes red.

Question 10.State two ways to prevent the rusting of iron.

Answer:A. Ways to prevent the rusting of iron

a) By painting

b) By galvanising

Question 11.What type of oxides are formed when non-metals combine with oxygen ?

Answer:Acidic oxides

Question 12.Give reasons :

a) Platinum, gold and silver are used to make jewellery.

b) Sodium, potassium and lithium are stored under oil.

c) Aluminium is a highly reactive metal, yet it is used to make utensils for cooking.

d) Carbonate and sulphide ores are usually converted into oxides during the process of extraction.

Answer:

a) Platinum, gold and silver are non-reactive and give shining surface.

b) Sodium, potassium and lithium are very reactive and catch fire when exposed to air.

c) Aluminium forms a non-reactive layer of aluminium oxide an its surface.

d) It is easier to reduce oxides into metal.

Question 13. You must have seen tarnished copper vessels being cleaned with lemon or tamarind juice. Explain why these sour substances are effective in cleaning the vessels.

Answer:Copper vessels get a green deposit of basic copper carbonate. Since copper carbonate dissolves in mild acids of lemon or tamarind juice, copper vessels are cleaned.

Question 14.Differentiate between metal and non-metal on the basis of their chemical properties.

Answer:

Metals

Non-metals

1) Metals form basic oxides, some of which form alkalis.

1) Non-metals form acidic or neutral oxides.

2) Metals replace hydrogen from acids and form salts.

2) Non-metals donot replace hydrogen from acids.

3) Metals can lose electrons easily to form positive ions.

3) Non-metals can gain electrons easily to form negative ions.

4) With chlorine, metals form chlorides which are covalent.

4) With chlorine, non metals form chlorides which are covalent.

5) With hydrogen, few metals form hydrides which are electrovalent.

5) With hydrogen, non-metals form many stable hydrides which are covalent.

6) Reactive metals can displace hydrogen from water.

6) Non-metals cannot displace hydrogen form water

Question 15.A man went door to door posing as a Goldsmith. He promised to bring back the glitter of old and dull gold ornaments. An unsuspecting lady gave a set of gold bangles to him, which he dipped in a particular solution. The bangles sparkled like new but their weight was reduced drastically. The lady was upset but after a futile argument the man beat a hasty retreat. Can you play the detective to find out the nature of the solution he had used ?

Answer: Aqua regia – a mixture of concentrated hydrochloric acid and concentrated nitric acid in the ratio of 3:1, since it dissolves gold.

Question 16. Give reasons why copper is used to make hot water tanks and not steel (an alloy of iron.

Answer: Copper is better conductor of heat than steel, therefore it is used for making hot water tanks