1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
german
3 years ago
12

Geetha took some grains of boiled rice in test tube A and Tina took boiled and chewed rice in test tube B. Both of then poured 1

-2 drops of iodine solution into the test tubes. What would they have observed? Give a reason for your answer.
Chemistry
1 answer:
Mekhanik [1.2K]3 years ago
6 0

Answer:

Test tubes A and B turn a darker blue color.

Explanation:

Based on the information provided in the question it can be said that they should have noticed that Tube A and Tube B turned a dark blue color. This is because the starch turns the solution in the test tubes into a dark blue color due to the negative reaction caused by the conversion of starch present in salivary amylase

You might be interested in
The pre-exponential constant and activation energy for the diffusion of iron in cobalt are 1.7 x 10-5 m2/s and 273,300 J/mol, re
Kitty [74]

<u>Answer:</u> The temperature of the system will be 1622 K

<u>Explanation:</u>

The equation relating the pre-exponential factor and activation energy follows:

\log D=\log D_o-\frac{E_a}{2.303RT}

where,

D = diffusion coefficient = 2.7\times 10^{-14}m^2/s

D_o = pre-exponential constant = 1.7\times 10^{-5}m^2/s

E_a = activation energy of iron in cobalt = 273,300 J/mol

R = Gas constant = 8.314 J/mol.K

T = temperature = ?

Putting values in above equation, we get:

\log (2.7\times 10^{-14})=\log (1.7\times 10^{-5})-\frac{273,300}{2.303\times 8.314\times T}\\\\T=1622K

Hence, the temperature of the system will be 1622 K

8 0
3 years ago
What is - 10°F in degrees Celsius
Anon25 [30]

Answer:

-23.333 °C

Explanation:

(-10°F − 32) × 5/9 = -23.33°C

6 0
4 years ago
Read 2 more answers
Disadvantages of modern periodic table?<br>​
ira [324]

Answer:

It has its elements with mass numbers phrased in many decimal places, it requires one to round off to get the actual value.

The atomic numbers of some elements such as Protonium were just guessed.

4 0
3 years ago
Kolbe's reaction with an example​
elena-s [515]

Answer:

∵

Explanation:

3 0
3 years ago
What is one thing that wind, solar, and hydropower all have in common?
vampirchik [111]

Answer:

they are all renewable resources!

Explanation:

Hope this helps! ;-)

7 0
2 years ago
Read 2 more answers
Other questions:
  • Give three examples,from the lab where potential energy was converted to kinetic energy?​
    12·1 answer
  • How many liters of O2 are required to produce 3.99 miles of CO2?
    10·1 answer
  • How many moles of gold atoms do 4.05×1024 gold atoms constitute?
    7·1 answer
  • How has thermal energy, heat, and temperature change?
    9·2 answers
  • Based on the information in the above chart, which of these bases would be the best conductor of electricity?
    14·2 answers
  • When oxygen and aluminum form an ionic compound, what is the formula? O2Al3 O3Al2 A3O2 Al2O3
    5·1 answer
  • Consider the reaction of diboron trioxide with carbon and chlorine. B2O3 (s) + 3C (s) + 3Cl2 (g) 2BCl3 (g) + 3CO (g) Determine t
    13·1 answer
  • Mole ratio compares the subscripts of two compounds in a balanced reaction.
    10·1 answer
  • Help pls what is the (H+) of a solution with a pH of 4?
    15·2 answers
  • Nitric oxide (NO) from car exhaust is a primary air pollutant. Calculate the equilibrium constant for the reaction
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!