
химия
Authored by Баян Ирсаева
Chemistry
9th - 12th Grade

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6 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Коволенттік полюссіз байланыс
HCL
I2
Al
H2O
2.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
The most abundant element in the earth's crust?
Hydrogen
Oxygen
Ozone
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The sixth group of cations includes
Al3+ Cr3+ Zn2+ As(III) As(V)
Cu2+ Hg2+ Co2+
To+ NH 4+ Na+
Fe2+ Fe3+ Mn2+ Bi3+ Mg2+
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The ionic strength of a 0.1 M sodium chloride solution:
0.01 M
0.1 M
0.001 M
0.0001 M
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
At pH =8.0, the concentration of hydroxide ions is equal:
10-6 M
10-1 M
10-5 M
10-7 M
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Алюминий 2713Al атомдарын ά – бөлшектерімен атқылағанда атом массасы 30 болатын кремний изотопы және тағы бір элемент түзіледі. Бұл элемент
1/1 H
4/2 He
7/3 Li
9/4 Be
11/5 B
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