Контрольная работа по теме «Изменения, происходящие с веществами»
Вариант 1
1. Расставьте коэффициенты и определите тип реакций в схемах уравнений:
a) Al + S → Al2S3
б) N2 + H2 → NH3
в) Fe2O3 + Al → Fe + Al2O3
г) PbO2 → Pb + O2
д) Ca(OH)2 + HNO3 → Ca(NO3)2 + H2O
е) Fe(OH)3 + H2SO4 → Fe2(SO4)3 + H2O

2. Запишите план разделения смеси сахарного песка и речного песка.

3. Запишите уравнения по схемам:
a) оксид фосфора (V) + вода = ортофосфорная кислота
б) соляная кислота + алюминий = хлорид алюминия + водород
в) нитрат серебра + хлорид железа (III) = хлорид серебра + нитрат железа (III)
г) гидроксид алюминия = оксид алюминия + вода

I really love the city of Semyonov because you can see many different sights, old buildings and monuments there. But I would like to devote my attention to the Museum of History and Art. The Semenovsky Museum of History and Art was founded in 1934 by the artist Georgy Petrovich Matveev. The exhibition halls of the museum were originally located in an old two-story building located on Matveev Street. In 1991, a two-story red brick mansion on ul. Vaneeva, built at the end of the 19th century and previously owned by the merchant-Old Believer Pyotr Petrovich Sharygin.

1. I HAVE 5 BOOKS . 2. SHE HAS GOTA LOT OF   TOYS .3. I HAVE A TELEPHONE .4. HE HAS GOT A LOT OF GOOD MATES .5. I HAVE 10 FRIENDS .

1. I HAVE NOT A COMPUTER .2. SHE HAS NOT A BALL .3. HE HAS NOT A BROTHER .4. I HAVE NOT A SLIME.5. THEY HAVE NOT A HOUSE .

1. DO YOU HAVE A TOY ? .2. DO THEY HAVE A CHILD ? .3. DOES SHE HAVE A BOOK ? .4. DOES HE HAVE A ROOM ? .5. DO YOU HAVE A COPYBOOK ?

1. YOU MUST TO HAVE A PEN !2. SHE HAS NOT A DRESS !! 3.YOU MUST TO HAVE  A BOOK ! .4. YOU MUST TO WRITE ESSAY WITH A PEN ! .5. YOU HAVE BEAUTIFUL HOUSE !

Объяснение: