Tuman maktab 8 sinf o‘quvchisi

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15

Sana________

7-nazorat ishi Yozma ish.

1-variant

1. Oltingugurt(lV)-oksidning asosli oksidlar, ishqorlar va suv bilan reaksiya tenglamasini yozing.

2.FeS ning massa ulushi 88% bo’lgan 1kg temir sulfiddan qancha (n.sh) hajm vodorod sulfid olish mumkin?

3 . NO + O₂ NO₂ + Q reaksiyada temperatura ortishi, bosimni kamayishi muvozanatni qaysi tomonga siljiladi?

4. Quyidagi o'zgarishlardagi A va В moddalarni aniqlang va reaksiya tenglamalarini yozing.

A →SO₂ →SO₃ →B

2- variant

1. Sutfat kislotaning bariy xlorid , uglerod, kalsiy oksidlar bilan reaksiya tenglamalarini tuzing va tenglashtiring.

2. 20g o’yuvchi natriyni to’la neytrallash uchun qancha gramm sulfat kislota kerak?

3. Quyidagi o’zgarishlarni amalga oshirish uchun zarur bo’lgan reaksiya tenglamalarini yozing: S→ZnS→SO₂→S

4. 2,81 oltingugurl (IV)- oksidni olish uchun kerak bo’ladigan piritni massasini toping (n.sli)

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Ball_____________________ O’qituvchining imzosi