Home
Class 10
CHEMISTRY
An element 'A' on exposure to moist ...

An element 'A' on exposure to moist air turns to form compound 'B' Which is reddish brown . Identify 'A' and 'B'.

A

A' is Ag , 'B' is `Ag_(2s)`

B

A' is Cu,'B' is CuO

C

A' is Mg ,'B' is MgO

D

A' is Fe , 'B' is `Fe_(2) O_(3)`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • TYPES OF CHEMICAL REACTONS

    SURA PUBLICATION|Exercise ADDITIONAL QUESTION & ANSWERS ( FILL IN THE BLANKS ) :|121 Videos

  • TYPES OF CHEMICAL REACTONS

    SURA PUBLICATION|Exercise ADDITIONAL QUESTION & ANSWERS ( STATE WHETHER THE FOLLOWING STATEMENTS ARE TRUE OR FALSE CORRECT THE FALSE STATEMENT ) :|16 Videos

  • TYPES OF CHEMICAL REACTONS

    SURA PUBLICATION|Exercise GOVERNMENT EXAM QUESTIONS & ANSWERS|1 Videos

  • SOLUTIONS

    SURA PUBLICATION|Exercise ADDITIONAL QUESTIONS & ANSWERS ( HIGHER ORDER THINKING SKILLS (HOTS ) ):|1 Videos

Similar Questions

Explore conceptually related problems

An element ‘A’ on exposure to moist air turns reddish - brown and a new compound 'B' is formed. The substance 'A' and 'B' are

An element A belonging to group 2 and period 2 reacts with chlorine at elevated temperature to give compound (B) compound B combines with LiAlH_4 to form compound (C). Which is an hydride identify A, B and C.

An isotope of hydrogen reacts with oxygen to give compound (A), which is used as a moderator in nuclear reactor. Like hydrogen, this isotope also undergoes addition reaction. It reacts with ethylene to give compound B, which is a saturated hydrocarbon. Identify the element A and B. A is radioactive.

An element occupies group number 1 and period number 3. This element when exposed to air gives compound (A). The element with water forms compound (B). Which is a strong base und (A) with ammonia gives compound (C ) which is used as reducing agent in organic chemistry. The element reacts with an halogen and forms cooking salt (D). Identify A, B, C and D.

An element occupies group number 1 and period number 2. This element burns with air and forms compound A. With water, it gives compound B, with hydrogen it forms an ionic compound C. Identify the elements, A, B and C.

BF_(3) reacts with LiH and forms a compound A. The compound A reacts with water to give the compound B. A reacts with ammonia at 390 K and form C. Identify (A), (B) and (C).

The chief ore of Zinc, on roasting gave a compound A, which on reduction by carbon, gives B. Identify A and B, give the chemical reactions.

SURA PUBLICATION-TYPES OF CHEMICAL REACTONS-ADDITIONAL QUESTION & ANSWERS ( CHOOSE THE CORRECT ANSWER ) :
  1. The products formed when calcium oxide reacts with water is .

    Text Solution

    |

  2. The reaction between hydrogen and oxygen gas to form water is ...

    Text Solution

    |

  3. An element 'A' on exposure to moist air turns to form compound ...

    Text Solution

    |

  4. CaCO(3(s)) overset("Heat ") to CaSO((s)) +CO(2(aq)) The above ther...

    Text Solution

    |

  5. Formation of ammoina from nitrogen and hydrogen is an example ...

    Text Solution

    |

  6. Which among the following chemical reaction is an example of com...

    Text Solution

    |

  7. Pick out : compound + element to compound type of combination ...

    Text Solution

    |

  8. Decompostion reactions are brought about by .

    Text Solution

    |

  9. When Zinc metal is placed in hydrochloric acid , the gas evolv...

    Text Solution

    |

  10. Pick out a chemical reaction which is not feasible

    Text Solution

    |

  11. Pick out the metal that displaces hydrogen from hydrochloric ac...

    Text Solution

    |

  12. When a double displacement reaction takes place , one of the p...

    Text Solution

    |

  13. Pb (NO3)2 +2KI to PbI2 +2KNO3 is a reaction

    Text Solution

    |

  14. Heat is evolved during reaction .

    Text Solution

    |

  15. Which among the following is not a balanced equation ?

    Text Solution

    |

  16. Which among the following factors affect the rate of a reaction...

    Text Solution

    |

  17. The value of ionic product of water at 25 ^@ C is .

    Text Solution

    |

  18. Ionic product of water is expressed as .

    Text Solution

    |

  19. Acids have pH .

    Text Solution

    |

  20. chemically rust is .

    Text Solution

    |